If the diameter of the base of a closed right circular cylinder be equal to its height h, then its whole surface area is
In a cylinder, if radius is doubled and height is halved, curved surface area will be
The circumference of a circle is 100 cm. The side of square inscribed in the circle is
The ratio of outer and inner perimeters of a circular path is 23 : 22. If the path is 5 m wide, the diameter of inner circle is
The radius of wheel is 0.25 m. The number of revolutions it will make to travel a distance of 11 km will be
A circular park has a uniform path of uniform width around it. The difference between the outer and inner circumferences of the circular path is 132 m. Its width is
If a wire is bent into the shape of a square, then the area of square is 81 sq cm.When wire is bent into a semicircular shape , then the area of semicircle is
A wire can be bent in the form of a circle of radius 56 cm. If it is bent in the form of square then its area is
The difference between the circumference and radius of a circle is 37 cm. The area od circle is
If the circumference and Area of a circle are numerically equal, then diameter of the circle is