Solve the problem.A long strip of sheet metal 12 inches wide is to be made into a small trough by turning up two sides at right angles to the base. If the trough is to have maximum capacity, how many inches should be turned up on each side?
A. 4 inches
B. 6 inches
C. 3 inches
D. 4 inches on one side, 5 inches on the other
Answer: C
Mathematics
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A. 
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