Question

a hollow sphere in which a circus motor cyclist performs his stunts has a interior diameter of 7 meter. The area available to the cyclist for driving is

Answer 1

Solution:
Interior Radius of the hollow sphere = 7/2 = 3.5m

The inner surface area of the hollow sphere with an interior diameter of 7m= The surface area of a sphere having the same diameter 7m.

Surface area of the sphere with diameter of 7m
= 4πr^2
= 4× π × 3.5^2 = 153.94 m^2

Therefore, inner surface area of the hollow sphere = 153.94 m^2.

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