SOLUTION: if the surface area of a rectangular solid is 136 in2, find h if l =8in. and w=4in.

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Question 459809: if the surface area of a rectangular solid is 136 in2, find h if l =8in. and w=4in.
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
Surface area = 2lw +2lh+2hw
l=8
w=4
2*8*4+2*8*h+2*h*4
64+16h+8h=136
24h=136-64
24h=72
h= 3 in