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A spherical soap bubble is expanding so ...

A spherical soap bubble is expanding so that its radius is increasing at the rate of 0.02 cm/sec. At what rate is the surface area increasing when its radius is 5 cm ? (Take `pi = 3.14`)

A

`(16pi)/(5)cm^(2)"/sec"`

B

`(2pi)/(5)cm^(2)"/sec"`

C

`(8pi)/(5)cm^(2)"/sec"`

D

`(4pi)/(5)cm^(2)"/sec"`

Text Solution

Verified by Experts

The correct Answer is:
D
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