Physics, asked by sureshaggarwal3926, 1 year ago

The radius of a circular blot of oil is increasing at the rate of 2 cm per minute find the rate of change of its area when its radius is 3 cm

Answers

Answered by hannjr

5

Answer:

A = pi * r^2

dA/dt = 2 * pi * r * dr/dt = 2 * pi * 3 * 2 = 12 * pi cm^2 / sec = 37.7 cm^2 / sec

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