Question 78
If the diameter of a sphere is 14 cm, then what is the surface area $$(in cm^{2})$$ of the sphere?
Solution
Diameter of a sphere is 14 cm = d = 14cm
then radius, r = 7cm
surface area of sphere = $$4\pi r^{2}$$ = $$4\times\frac{22}{7}\times7^{2}$$ = 616 $$cm^{2}$$
so the answer is option A.
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