Given a cylinder with a volume of 502.4 in3 and radius 4 in. Find the height of the cylinder. Take π as 3.14.
The picture below shows the cylinder with the radius 4 inches and height h.
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:
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:
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:
Therefore, the answer is B.
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