Description
The length of a rectangular piece of steel in a bridge is 3 meters less than double the width. The perimeter of the piece of steel is 42 meters. Find the length of the piece of steel. Find the width of the piece of steel.
Explanation & Answer
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Let the length = L
Let the width = W
Now
length of a rectangular piece of steel in a bridge is 3 meters less than double the width
Meaning
L=2W-3
Perimeter = 2(Length + width)
=2(2W-3+W)
24 =2(3W-3)
or
6W-6=24
6W=30
W=30
Width is 30 meters
Length = 2*30-3 = 60-3 = 57 meters.
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