Step 1

The picture below shows the cylinder with the radius 4 inches and height h.

Step 2

Since the value of the volume and radius are given, we substitute V with 64, r with 4 and π with 3.14 into the formula as shown:

Step 3

Now, we have 502.4 = 50.24h. We can find h by dividing both sides of the equation by 50.24. This is shown below:

Step 4

Now, the calculated number 10, has no meaning until we include the unit for it. Since radius is in unit inch, the unit for h will be inch. Hence:

h = 10 in

Step 5

Therefore, the answer is B.

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