Physics · Mathematical tools and vector · Applications of Differentiation
JEE MainsNEET
The radius of a circle decreases at 2 cm s⁻¹. Find dA/dt when r = 5 cm.
Options
-20π cm² s⁻¹
20π cm² s⁻¹
-10π cm² s⁻¹
-25π cm² s⁻¹