Let A be the area of a circle with radius r that is increasing in size with respect to time. If the rate of change of the area is 3 cm/s?

Let A be the area of a circle with radius r that is increasing in size with respect to time. If the rate of change of the area is 3 cm/s, find the rate of change of the radius when the radius is 6 cm.

rotchm2021-03-10T02:28:39Z

A = πr², right? Differentiating wrt t each side gives

A' = π * 2r * r', right?

You are given A' and r. So what is r' ?
Done!

don't forget to vote BA!

10

Trending Questions

Solve the equation sin(x+3)=sinx, 0=<x=<2pi to 4 decimal places. The product of the two solutions is:?7 answersFind A using the formula  A = Pe^rt?8 answersFind the area of the parallelogram if BC=16.?8 answersHow many metres are in a mile...?8 answershow to find the area of a circle 12cm?7 answers