The radius of a circle is increasing at a rate of 10 centimeters per minute. Find the rate of change of the area when the radius is 5 centimeters.
Round your answer to one decimal place.
The rate of change of the area is Number
Units
Rounding to one decimal place, the rate of change of the area when the radius is 5 centimeters is approximately \(\boxed{314.2}\) square centimeters per minute.
Step 1 :The problem involves a circle with a radius that is increasing at a rate of 10 centimeters per minute. We are asked to find the rate of change of the area when the radius is 5 centimeters.
Step 2 :The area of a circle is given by the formula \(A = \pi r^2\), where \(r\) is the radius of the circle.
Step 3 :We can solve this problem by taking the derivative of the area with respect to time. This gives us \(\frac{dA}{dt} = 2\pi r \frac{dr}{dt}\).
Step 4 :We are given that \(\frac{dr}{dt} = 10\) cm/min and \(r = 5\) cm.
Step 5 :Substituting these values into the equation gives us \(\frac{dA}{dt} = 2\pi (5) (10)\).
Step 6 :Solving this equation gives us \(\frac{dA}{dt} = 314.1592653589793\) cm²/min.
Step 7 :Rounding to one decimal place, the rate of change of the area when the radius is 5 centimeters is approximately \(\boxed{314.2}\) square centimeters per minute.