The kingston review (kr) is testing a new gmat question. the kr wants to determine what proportion of test-takers will answer th
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Answer:
Step-by-step explanation:
Since, the surface area of a cylinder,
................(1)
Where,
r = radius,
h = height,
If
( by middle term splitting )
By zero product property,
r = 3 or r = - 6 ( not possible )
Thus, radius, r = 3 meters,
Now, differentiating equation (1) with respect to t ( time ),
∵ h = constant, ⇒ dh/dt = 0,
We have,
Now,
Volume of a cylinder,
Differentiating w. r. t. t,