engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Mathematics Differential Calculus Applications of Derivatives
If the radius of the circle changes at the rate of \(\rm-\frac{2}{\pi}\ m/sec\), at what rate does the circle's area change when the radius is 10 m?
1
40 m2/sec
2
30 m2/sec
3
-30 m2/sec
4
-40 m2/sec