Multiple choice

A sphere has a radius of 5 cm. If it is divided into two hemispheres, what would be the total surface area of the two hemispheres?

  1. $75 π cm2$
  2. $125 π cm2$
  3. $150 π cm2$
  4. $100 π cm2$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A sphere has surface area 4πr². When divided into two hemispheres, each hemisphere has curved surface area 2πr² plus circular base area πr², giving total 3πr² per hemisphere. For two hemispheres: 2×3πr² = 6πr² = 6π(5)² = 150π cm². Option B (125π) incorrectly uses 5πr² formula, and options A and D don't match the correct calculation.