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The volumes of a right circular cylinder and a sphere are equal. The radius of the cylinder and the diameter of the sphere are equal. The ratio of height and radius of the cylinder is:
Length of a class-room is two times its height and breadth is times its height. The cost of white-washing the walls at the rate of Rs. 1.60 per m2 is Rs. 179.20. Find the cost of tiling the floor at the rate of Rs. 6.75 per m2.
The curved surface area and the total surface area of a cylinder are in the ratio 1 : 2. If the total surface area of the right cylinder is 616 cm2, then its volume is :
Four pieces, each in the shape of arc of a circle with radius 2 cm are cut out from four corners of a square of side 4 cm. The area of the remaining portion is:
If circum-circle of an equilateral triangle is the in-circle of another equilateral triangle, then find ratio of the areas of both triangles.
A metallic sphere of radius 10.5 cm is melted and then recast into small cones each of radius 3.5 cm and height 3 cm. The number of cones thus formed will be how much?
A cube and a sphere have equal surface areas. The ratio of their volumes will be _____.
A metal pipe is 21 cm long and its exterior diameter is 8 cm. If the thickness of the pipe is 1 cm and the metal weighs 8 gm/cm3, the weight of the pipe (in kg.) is
The volume of a cube is 512 cm3. Its surface area (in sq cm) is
A square and a regular hexagon are drawn such that all the vertices of the square and the hexagon are on a circle of radius r cm. The ratio of area of the square and the hexagon is
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May 17SSC & Railway