jordann23 jordann23

23-02-2017
Mathematics

contestada

An offshore oil well is leaking oil and creating a circular oil slick. If the radius of the slick is growing at a rate of 5 miles/hour, find the rate at which the area is increasing when the radius is 6 miles.

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ChandrikaP ChandrikaP

23-02-2017

area of a circle=π*r^2
rate of change in area dA/dt=2*r*π
at r=6 miles
dA/dt=2*2π=4π

hope i am right :)

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