Posted by A.J on Tuesday, April 8, 2014 at 9:03pm.
what happens to the surface area of a rectangular prism when each of the dimensions is doubled? 1. it doubles 2. it quadruples 3. it is six times greater 4. it is halved

Math  I don't know  Ms. Sue, Tuesday, April 8, 2014 at 9:20pm
Sorry.

Math (Please Help Ms. Sue)  Reiny, Tuesday, April 8, 2014 at 9:27pm
The surface area of two similar solids is proportional to the square of their corresponding sides,
so the square of the "doubling" is 2^2 or 4
So the surface area is quadrupled
or
let the original dimensions be l , w, and h
surface area = 2lw + 2lh + 2 wh
= 2(lw + lh + wh)
new dimensions : 2l , 2w and 2h
new surface area
= 2((2l)(2w) + (2l)(2h) + 2(2w)(2h)
= 8( lw + lh + wh)
and 8( lw + lh + wh) is 4 times as large as 2(lw + lh + wh)
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