If the surface area of sphere is 616 cm2, find its radius. \(\left(\text{Use } \pi=\frac{22}{7}\right)\)
7 cm
Surface area of a sphere = \( 4\pi r^2 \).
\( 4\times\frac{22}{7}\times r^2=616\Rightarrow r^2=\frac{616\times7}{88}=49 \).
\( r=\sqrt{49}=7 \) cm.
Hence, the radius of the sphere is 7 cm.
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