The total surface area of a sphere is 22176 cm2. The diameter of the sphere is:
(use = )
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 84 cm.
T.S.A of sphere = 4πr2
⇒ 22176 = 4 × 22/7 × r2
⇒ r2 = (22176 × 7)/(4 × 22)
⇒ r2 = 1764
⇒ r = 42
Diameter = 2 × radius
Diameter = 42 × 2 = 84 cm