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