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QUESTION
The perimeter of a rectangle is 48 in. If the length is twice the width, what is the length of the rectangle?
Length##=16## inches
Let ##l## be the length and ##w##, width.
It is stated that, ##l=2w................(1)##.
Now, the perimeter of the rectangle##=48##.
## rArr 2(l+w)=48, or, l+w=24##
## rArr 3w=24...............[by(1)]##
##:. w=8, &, so, l=2w=16## inches.
