How fast is area increasing when the radius is given


The circular plate is being heated so that radius is increasing at the rate of 0.09in/h. How fast is area increasing when the radius is = 15 inches?

four possible solutions:

Option A: 20.25 p in^2/h

Option B: 2.7 in^2/h

Option C: 20.25 in^2/h

Option D: 2.7 p in^2/h

Describe the solution.

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Mathematics: How fast is area increasing when the radius is given
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