If 2744 identical small spheres are made out of a big sphere of radius 7 cm, then what is the surface area of each small sphere?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e π cm2.
Volume is conserved: (7/r)3 = 2744 = 143 ⇒ r = 0.5 cm
Surface area of each small sphere = 4πr2 = 4π(0.5)2 = π cm²