1.

The radius of a cylinder is increasing at the rate of 3 m / s and its altitude is decreasing at the rate of 4 m / s. The rate of change of volume when radius is 4 m and altitude is 6 m is:

A. 80 m3 / s
B. 144 π m3 / s
C. 64 m3 / s
D. 80 π m3 / s
Answer» E.


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