Question

The hollow sphere,in which the circus motorcyclist performs his stunts, has a diameter of 7 m. Find the area available to the motorcyclist for riding. ​

Answer 1

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Diameter of the sphere = 7m

Therefore, radius is 3.5 m. So, the riding space available for the motorcyclist is the surface area of the 'sphere'which is given by

4π $r {}^{2}$= 4 × 22/7 × 3.5 × 3.5 m2

= 154 m2.

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Answer 2

Area of Sphere is = πd^2 OR 4πr^2

So that ,πd^2 = 153.93804

I hope that helps you