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14 October, 16:46

A closed rectangular box has volume 28cm3. What are the lengths of the edges giving the minimum surface area? lengths =

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  1. 14 October, 18:50
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    For the surface of rectangle to be minimum the the dimensions must be equal. Let the length=width=height=x cm

    thus the volume will be:

    x*x*x=28

    x³=28

    x=∛28

    x=2√7 cm

    thus the dimensions are such that length=width=height=2√7
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