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Marina CMI [18]
2 years ago
14

the radius r of a sphere is 4cm and is increasing at the rate of 0.5cm . At what rate is the volume?​

Mathematics
1 answer:
Aleks04 [339]2 years ago
7 0

Answer:

32π or 100.53 cm^3  to the nearest hundredth.

Step-by-step explanation:

dr/dt = 0.5

V = (4/3)π r^3

So dV/dr = (4/3)* 3 π r^(3-1)

= 4πr^2

Rate of increase in volume:  

dV/dt = dV/dr * dr/dt

At r = 4:

Rate of increase in Volume

dV/dt = 4π(4)^2 * 0.5

= 64π * 0.5

= 32π.

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