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The hollow sphere, in which the circus ...

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.

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Inner diameter of the hollow sphere, `2r=7m`
Available area to the motorcyclist for riding = Inner surface area of the sphere
`Area=4πr^2=π(2r)^2`
`Area=22/7xx7^2=154m^2`
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