Physics : Time and Speed Online Test

Dinesh travels 760 km to his home, partly by train and partly by car. He takes 8 hours if he travels 160 km by train and the rest by car. He takes 12 minutes more if he travels 240 km by train and the rest by car. The speed of train and the car respectively are:
80 km/h, 100 km/h
100 km/h, 80 km/h
120 km/h, 100 km/h
100 km/h, 120 km/h
A cistern is filled in 5 hours and it takes 6 hours when there is a leak in its bottom. If the cistern is full in what time shall the leak empty it?
6 h
5 h
30 h
15 h
A and B together can do a piece of work in 6 days. A alone can do it in 10 days. What time will B require to do it alone?
20 days
15 days
25 days
30 days
Walking at ¾ of his usual pace, a man reaches, his office 20 minutes late. Find his usual time
2 h
1 h
3 h
4 h
A contractor undertook to do a piece of work in 9 days. He employed certain number of labourers but 6 of them being absent from the very first day the rest could finish the work in 15 days. Find the number of men originally employed?
15
6
13
9
An express train runs at an average speed of 100 km/h, stopping for 3 minutes after 75 km. A local train runs at a speed of 50 km/h stopping for 2 minute after every 25 km. If the train began running at the same time, how many kilometers did the local train run in the time it took the express train to run 600 km?
307.5 km
900 km
1200 km
1000 km
I can do a piece of work in 8 days, which can be done by you in 10 days. How long will it take to do it if work together?
4 4/9
5 3/9
5 ½
4 7/9
X and Y start from the same point and run around a circular stadium, whose circumference is 4200 m, at the rate of 500m and 700m per minute respectively in the opposite direction. They will meet each other in :
3.5 min
6.0 min
8.4 min
21 min
A and B weave a carpet in 10 days and 15 days respectively. They begin to work together but B leaves after 2 days. In what time will a complete the remaining work ?
6 1/3 days
6 2/3 days
7 days
8 days
Two pipes can fill a tank in 10 hours and 12 hours respectively, while the third can empty in 20 hours. If all the pipes are opened together, then the tank will be filled in :
7 ½ hours
10 hours
8 hours
9 1/10 hours
A worker is paid Rs.56 for 35-hour week. Up to 40 hours, he paid at the normal rate and on overtime, 1.5 times the normal. How many hours did he work to get Rs.88?
48
50
58
55
Two rockets approach each other, one at 42000mph and other at 18000mph. They start 3256 miles a part. How far are they a part (in miles) 1 minute before impact ?
1628
1000
826
1200
A car can finish a certain journey in 10 hours @ 48 km/h. In order to cover the same distance in 8 hours, the speed of the car must be increased by :
6 km/h
7.5 km/h
12 km/h
15 km/h
In a house, there are six 40-watt lamps which are on for 5 hours a day and three 80-watt fans which are on for 10 hours a day. If electricity costs Rs.2 per kilowatt hours, what is the monthly electricity bill ?
Rs.216
Rs.280
Rs.315
Rs.400
A can do a work in 18 days, B in 9 days and C in 6 days. A and B start working together and after 2 days C joins them. What is the total number of days taken to finish the work ?
4.33
4.0
4.66
5.33
A travels from B to C a distance of 250 miles in 5.5hours. He returns to B in 4 hours 40 minutes. His average speed is :
44
46
48
50
The diameter of a cycle wheel is 70 cm. A cyclist takes 30 hours to reach a destination at the speed of 22 km/h. How many revolutions will the wheel make during this journey ?
3 million
3 lakh
4 lakh
None of these
A boat goes 24km upstream and 28 km downstream in 6 hours. It goes 30 km upstream and 21 km downstream n 6 hours and 30 minutes. The speed of the stream :
10 km/h
5 km/h
4 km/h
6 km/h
Ramesh is twice as good workman as Sunil and finished a piece of work in 3 hours less than Sunil. In how many hours they together could finish that piece of work?
2 1/3
2
1 2/3
None of these
If 15 women or 10 men can complete a project in 55 days, in how many days will 5 women and 4 men working together complete the same project?
75
95
55
85
A mother and a daughter working together can complete a work in 4 days. But if the mother works alone she can complete the work in 6 days. Both of them worked for one day and then the mother had to leave. How long will the daughter take to complete the remaining work?
7 days
8 days
9 days
10 days
A cistern has two taps (which fill it in 12 min and 15 min respectively) and an exhaust tap. When all three taps are opened together, it takes 20 min to fill an empty cistern. How long will the exhaust tap take to empty it?
20 min
16 min
12 min
10 min
A certain job was assigned to a group of men to did it in 20 days. But 12 men did not turn up for the job and the remaining men did the job in 32 days. The original number of men in the group was:
32
34
46
40
12 men complete a work in18 days. Six days after they had started working, 4 men joined them. How many days will all of them take to complete the remaining work?
10 days
12 days
15 days
9 days
24 men working at 8 hours a day can finish a work in 10 days. Working at the rate 10 hours a day, the number of men required to finish the same work in 6 days is :
30
32
34
36
In climbing a 21m long round pole, a monkey climbs 6 m in the first minutes and slip 3 m in the next minutes. What time (in minutes) the monkey would take to reach the top of the pole?
11
14
14 2/3
9
Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. The tank is half full. All the three pipes are in operation simultaneously. After how much time the tank will be full?
3 9/17 h
11 h
2 8/11 h
1 13/17 h
A plane left 30 minutes later than the scheduled time and in order to reach its destination 1500 km away in time, it has to increase its speed by 250 km/h from its usual speed. Find its usual speed:
1000 km/h
750 km/h
850 km/h
650 km/h
Two cars start together in the same direction from the same place. The first goes with a uniform speed of 10 km/h. The second goes at a speed if 8 km/h in the first hour and increase the speed by ½ km each succeeding hour. After how many hours will the second car overtake the first if both go non-stop:
9 hours
5 hours
7 hours
8 hours
A and B together can do a piece of work in 12 days. B and C together can do the same work in 16 days. After A has been working at it for 5 days and B for 7 days, C finishes it in 13 days. In how many days will C alone be able to do the work?
16
24
36
48
A tap can fill a cistern in 8 hors and another can empty it in 16 hours. If both the taps are opened simultaneously, the time ( in hours) to fill the cistern will be:
8
10
16
24
A train is moving at a speed of 132 km/h. If the length of the train is 110 meters, how long will it take to cross a railway platform 165 meters long?
5 s
7.5 s
10 s
15 s
A student rides on a bicycle at 8 km/h and reaches his school 2.5 minutes late. The next day he increases his speed to 10 km/h and reaches the school 5 minutes early. How far is the school from his house?
1.25 km
8 km
5 km
10 km
A man makes his upward journey 16 km/h and downward journey 28 km/h. what is his average speed?
32 km/h
56 km/h
22 km/h
10 km/h
A train running between two stations A and B arrives at its destination 10 minutes late when its speed is 50 km/h and 50 minutes late when its speed is 30 km/h. what is the distance between the stations A and B?
40 km
50 km
60 km
70 km
A certain distance is covered by train with a certain speed. If half the distance is covered in double time, then the ratio of this speeds to that of the original is:
1 : 4
4 : 1
1 : 2
2 : 1
During a journey of 80 km a train covers first 60 km with a speed of 40 km/h and completes the remaining distance with a speed of 20 km/h. What is the average speed of the train during the whole journey?
30 km/h
32 km/h
36 km/h
40 km/h
A clock gains 15 minutes per day. It is set right at 12 noon. What time will the clock show at 4.00 am the next day?
4 : 10 am
4 : 15 am
4 : 30 am
5 : 00 am
If a man travels at 30 km/h, he reaches his destination late by 10 minutes but if he travels at 42 km/h then he reaches 10 minutes earlier. Therefore the distance traveled by him is:
36 km
35 km
40 km
45 km
A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is
4 mph
3 mph
2.5 mph
2 mph
Two trains each of 120 m in length, run in opposite directions with a velocity of 40 m/s and 20 m/s. How long will take for the tail end of the two trains to meet each other during the course of travel:
2 s
3 s
4 s
5 s
A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions. The number of revolutions made by the larger wheel is:
12
49
9
4
Two trains starting at the same time from two stations, 200 km apart going in opposite directions, cross each other at a distance of 110 km from one of them. What is the ratio of their speeds?
11 : 20
9 : 20
11: 9
19 : 20
A car can finish a certain journey in 10 hours at the speed of 48 km/h. In order to cover the same distance in 8 hours, the speed of the car must be increased by:
6 km/h
7.5 km/h
12 km/h
15 km/h
5 person working eight hours daily can complete a wall in 10 days. When they have worked for 5 ½ days, 5 more persons are bought to work. The wall can now be completed in:
One more day
Two more days
Three more days
Four more days
A small aeroplane can travel at 320 km/h in still air. The wind is blowing at a constant speed of 40 km/h. The total time for a journey against the wind is 135 minutes. What will be the time in minutes for the return journey with the wind? (ignore take off and landing time for the aeroplane):
94.5
105
108.125
120
Two cyclist start on a circular track from a given point but in opposite directions with speeds of 7m/s and 8m/s respectively. If the circumference of the circle is 300 meters after what time will they meet at the starting point?
20 s
100 s
300 s
200 s
Description:

Paper has 47 questions which are required to be complied in an hours time.

Discussion

Peng Ying

It take 3 men qorking at ghe same speed to complete a project in 8 hours . How long will it take 4 men working at the same speed to complete the same project ?

2882 days 22 hours 16 minutes ago

Kalyan Sarkar
Psychological interventions in Mathematics Study
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