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3 February, 07:38

in a mass production of machining the cutting speeds are 100,200, 300 ft./minute and the corresponding production rates (P) are 8,12 and 10 parts per hour respectively. Calculate the best cutting speed and the corresponding maximum number of parts per hour

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  1. 3 February, 11:13
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    The best production speed = 300ft/minute

    18000/10 = 1800ft/part hr

    Explanation:

    Cut Speed A = 100ft/minute

    Cut speed B = 200ft/minute

    Cut speed C = 300ft/minute

    Since 60 minutes = 1 hour

    Machine works for one hour

    Total length with cut for speed A = 60 * 100 = 6000ft

    Total length with cut speed B = 200 * 60 = 12000ft

    Total length with cut speed C = 300 * 60 = 18000ft

    Number of 8 part in length A = 6000/8 = 750ft/part hr

    Number of 12 parts in length B = 12000/12 = 1000ft/part hr

    Number of 10 parts in length C =

    18000/10 = 1800ft/part hr
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