Answer:
2 meter square per minute
Explanation:
Given the circumference is of the circle is increasing at a rate of 0.5 m/minute
We know that C = 2πr
We know that the area of the circle(A) = π

Let π=a

A = a


Differentiate both sides with respect to time

C at r= 4 is C = 8a
Given
= 0.5
= 2