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30 October, 15:08

The top of an auto piston is a circle with a diameter measuring 8.4 centimeters. what is the area of the top piston?

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  1. 30 October, 17:06
    0
    area of a circle = PI x r^2

    r = 8.4/2 = 4.2

    using 3.14 for PI

    area = 3.14 x 4.2^2 = 55.3896 square cm

    round answer as needed
  2. 30 October, 18:08
    0
    Radius = Diameter / 2

    So, Radius = 8.4/2 or 4.2

    4.2^2 = 17.64.

    17.64 x pi = 55.39 sq cm.

    cm because we are being consistent with the units of measurement already in use.
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