Homework Help: Physics

Posted by Kristi on Monday, September 3, 2012 at 6:57pm.

An open box with a square base (see figure) is to be constructed from 160 square inches of material. The height of the box is 3 inches. What are the dimensions of the box? (Hint: The surface area is S = x2 + 4xh.)
1 . in. (length) × 2 . in. (width) × 3 . in. (height)

Physics - Elena, Tuesday, September 4, 2012 at 11:15am
S=x²+4xh= x²+12x =160.
x²+12x -160=0

x=- 6ąsqrt(36+160) .
x1=-20 (impossible),
x2= +8
1. 8 in;
2. 8 in;
3. 3 in.

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