solid mensuration
posted by sara .
the area of the total surface of a polyhedron weighing 64 lb. is 340 sq. in. what is the surface of a similar polyhedron made of the same material and weighing 1000 lb. ?
thank you!!

solid mensuration 
Steve
If the linear dimension scales by x,
surface scales by x^2
volume scales by x^3
so, since the weight(or volume) scaled by 1000/64 = (10/4)^3
the surface scales by (10/4)^2 = 6.25
6.25*340 = 2125
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