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2 March, 10:03

Find how many piranhas you can put in a cylindrical tank

whose diameter is 4 feet and whose height is 1.25 feet if

each piranha needs 1.5 cubic feet of water.

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  1. 2 March, 11:41
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    Answer: The correct answer is 10 piranhas.

    Step-by-step explanation:

    To calculate the total Volume of a cylinder we have to use the following formula:

    Volume = Area * Height

    Area = π * r², where r = radius

    The diameter is always the twice the radius so the diameter is 4 feet in this case and the radius is 2 feet so the area is

    Area = 3.1416 * (2*2)

    Area = 3.1416 * 4

    Area = 12.5664 square feet

    Volume = 12.5664 (area) * 1.25 (height).

    Volume = 15.708 cubic feet

    Each piranha needs 1.5 cubic feet so we have to divide the total Volume by the volume that each piranha needs

    15.708 / 1.5 = 10.472 or ten pirahnas because we can't put a fraction of a piranha in the tank.
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