SOLUTION: C-3 Plumbing: The length of a rectangular pipe is three times longer than its width.. Find the dimensions that give a cross-sectional area of 75 sq. in.
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Question 115405: C-3 Plumbing: The length of a rectangular pipe is three times longer than its width.. Find the dimensions that give a cross-sectional area of 75 sq. in.
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
3x*x=75
3x^2=75
x^2=75/3
x^2=25
x=sqrt25
x=5 in. is the width of the pipe.
3*5=15 is the length of the pipe.
proof
5*15=75
75=75
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