Question

A circular plate of radius 5 cm is heated. Due to expansion, its radius increases at the rate of 0.05 cm/sec. The rate at which its area is increasing when the radius is 5.2 cm is

• A. 5.05 π cm2/sec
• B. 5.2 π cm2/sec
• C. 0.52 π cm2/sec
• D. 27.4 π cm2/sec

Answer 1

Answer: (C)

0.52 π cm2/sec

Answer 2

The correct answer is (C) : 0.52 π cm2/sec.