Question

The volume of a spherical balloon is increasing at the rate of $6 cm^3/sec$. The rate of change of its surface area when its radius 2 cm is:

• A. $3 cm^2/sec$
• B. $\frac32 cm^2/sec$
• C. $6cm^2/sec$
• D. $9cm^2/sec$

Answer 1

Answer: (C)

$6cm^2/sec$

Answer 2

The correct option is (C): $6 cm^2/sec$