the hollow sphere, in which the circus motor cyclist perform his stunt*, has a diametre of 7 metre. Then the area available to the motorcyclist for riding

the hollow sphere, in which the circus motor cyclist perform his stunt*, has a diametre of 7 metre. Then the area available to the motorcyclist for riding
1). 59$\pi$ $metre^{2}$
2). 50$\pi$ $metre^{2}$
3). 49$\pi$ $metre^{2}$
4). None of these

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