<PRE><B>Question 823846</B>
 (A closed box has a surface area of 126 in. (squared). 
The base of the box is 5 in. by 3 in. what is the height of the box?)
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Area of six faces::
2 sides = 2*5*h
2 ends = 2*3*h
top and bottom: 2*3*5
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Equation:
2*5h + 2*3h + 2*15 = 126 in^2
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10h + 6h + 30 = 126
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16h = 96
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height = 6 in
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Cheers,
Stan H. </PRE>