Homework Help: Math Please help me

Posted by Sakiera on Friday, January 18, 2013 at 11:37am.

A rectangular prism has the following dimensions.

length: 8 cm

width: 13 cm

height: 10.5 cm

If all the dimensions of the prism are doubled, what will be its new surface area?

1,298 cm2
4,192 cm2
2,596 cm2
4,368 cm2

Math Please help me - Reiny, Friday, January 18, 2013 at 12:07pm
if each dimension is doubled, the surface area will be quadrupled, that is, multiplied by 4

so find the original area, multiply the answer by 4 and see if you find a match
(I see one, and it is not in the first two )

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