Asked by tristan

The surface area of this rectangular prism is 256 square millimeters. What is the value of l? the given numbers are h=4 w=8
Answered by Steve
4*8*L = 256
L = 256/32 = 8
Answered by Henry
L = ?
W = 8
h = 4

2W*h + 2L*h = 256 mm^2
2(8*4) + 2(L*4) = 256
64 + 8L = 256
8L = 256-64 = 192
L = 24 mm.

Vol. = L*W*h = 24 * 8 * 4 = 768 mm^3
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