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प्रश्न
Find the surface area of a sphere of diameter 3.5 m.
`["Assume "pi=22/7]`
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उत्तर
Radius (r) of sphere = `"Diameter"/2`
= `3.5/2`
= 1.75 m
Surface area of sphere = 4πr2
= `[4 xx 22/7 xx (1.75)^2] m^2`
= 38.5 m2
Therefore, the surface area of the sphere having diameter 3.5 m is 38.5 m2.
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(Use π = `22/7`)
