Ambar

Thank so much

Yea, it's hw I did not understand the way these sums are done though I have understood the concept of derivatives and differentiation but dese sums r totally new and different for me 2 so I wanted someone to guide me through it , yea I don't just want the answer I want the explanation or guidance so that I can answer rest of the questions myself

A circular disc of radius 3 cm is being heated. Due to expansion, it's radius increases at the rate of 0.05 cm/s . Find the rate at which it's area is increasing when radius is 3.2 CMS Some one please explain the way this sum is done with the help of calculus