The curved surface area of a sphere is 1386 cm2 . The volume of this sphere is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 4851 cm3.
The surface area of the sphere = 1386 cm2
Surface area of a sphere = 4πr2
Volume of a sphere = (4/3)πr3
Surface area of a sphere = 4πr2
4πr2 = 1386
4 × (22/7) × r2 = 1386
r = 21/2 cm
Volume of a sphere = (4/3)πr3
= (4/3) × (22/7) × (21/2)3
= 4851 cm3