Home Maths Differentiation and Applications of Derivatives Hard The volume of a spherical balloon is increas…
Maths Differentiation and Applications of Derivatives Hard Single Correct MCQ
Published on: August 14, 2026

The volume of a spherical balloon is increasing at the rate of 40 cubic centrimetre per minute . The rate of change of the surface of the balloon at the instant when its radius is 8 centimetre , is

A
sq cm / min
B
5 sq cm / min
C
10 sq cm / min
D
20 sq cm / min

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The correct answer is:
C

Here and

⇒ ⇒ ⇒ ⇒

.

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