SURFACE AREAS AND VOLUMES : SURFACE AREAS AND VOLUMES CHAPTER - 13
EXERCISE - 13.2
QUESTION 4:- A pen stand made of wood is in the shape of a cuboid with four conical depressions to hold pens. The dimensions of the cuboid are 15 cm by 10 cm by 3.5 cm. The radius of each of the depressions is 0.5 cm and the depth is 1.4 cm. Find the volume of wood in the entire stand. (see Fig.) : QUESTION 4:- A pen stand made of wood is in the shape of a cuboid with four conical depressions to hold pens. The dimensions of the cuboid are 15 cm by 10 cm by 3.5 cm. The radius of each of the depressions is 0.5 cm and the depth is 1.4 cm. Find the volume of wood in the entire stand. (see Fig.)
QUESTION 5:- A vessel is in the form of an inverted cone. Its height is 8cm and the radius of its top, which is open, is 5 cm. It is filled with water up to the brim. when lead shots, each of which is a sphere of radius 0.5 cm are dropped into the vessel, one-fourth of the water flows out. Find the number of lead shots dropped in the vessel. : QUESTION 5:- A vessel is in the form of an inverted cone. Its height is 8cm and the radius of its top, which is open, is 5 cm. It is filled with water up to the brim. when lead shots, each of which is a sphere of radius 0.5 cm are dropped into the vessel, one-fourth of the water flows out. Find the number of lead shots dropped in the vessel.
QUESTION 6:- A solid iron pole consists of a cylinder of height 220 cm and base diameter 24 cm, which is surmounted by another cylinder of height 60 cm and radius 8 cm. Find the mass of the pole, given that 1 cm3 of iron has approximately 8g mass. (use =3.14) : QUESTION 6:- A solid iron pole consists of a cylinder of height 220 cm and base diameter 24 cm, which is surmounted by another cylinder of height 60 cm and radius 8 cm. Find the mass of the pole, given that 1 cm3 of iron has approximately 8g mass. (use =3.14)
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