A cube and a sphere are of the same height. -Maths 9th

A cube and a sphere are of the same height. -Maths 9th
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Volume of cube/ volume of the sphere = a3 / 4/3.π.(a/2)3  = 6/π (Let edge of cube be a then radius of sphere = a/2) ∴  Required ratio = 6 : π
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Find the volume of a sphere whose surface area is 154 cm sq. -Maths 9th

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Description : A circular plate, a cube and a sphere, all made up of same material and having the same mass, are heated to 300°C and left in a room. Which of them will have the slowest rate of cooling? (1) Circular plate (2) Cube (3) Sphere (4) All will cool at the same rate

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