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6 November, 01:52

Find the number of steel ball bearings, each of diameter 0.7 cm, that can be made from 1kg of steel, given that 1cm cubed of steel weighs 7.8 g

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  1. 6 November, 02:13
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    Ball Bearing Volume = (4 / 3) * PI * radius ^3

    Volume = (4 / 3) * 3.14159265 * (.35) ^3

    Volume = (4 / 3) * 3.14159265 * 0.042875

    Volume = 0.17959438 cc

    1 cc of steel = 7.8 g

    Volume of 1 kg of steel = 1,000 cc / 7.8 g per cc

    1 kg = 128.205 cc

    Number of ball bearings we can make = 128.205 / 0.17959438

    Equals 713.86
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