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1)

What is the surface area of the sphere with radius "2r" cm?


A) 4πr2

B) 6πr2

C) 16πr2

D) 32πr2

Answer:

Option C

Explanation:

Surface area of sphere of radius r is 4πr2

When r=2r, Surface area= 4π(2r)2=16πr2