Asked by rajah

the area of a circle increasing at the rate of 3cm/sec.find the rate of change of the circumference when the radius is 2cm

help plz
Answered by Reiny
A = π r^2
dA/dt = 2π r dr/dt
given: dA/dt = 3 , find dr/dt when r = 2

3 = 2π (2) dr/dt

dr/dt = 3/(4π) cm/s
Answered by Adams
1.5
Answered by Beauty Makaya
34
There are no AI answers yet. The ability to request AI answers is coming soon!