The width of the rectangle is 2/3 of it's length. If the perimeter of the rectangle is 80cm,find it's area.
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Step-by-step explanation:
perimeter of rectangle =2×length+2×width
width=(2/3)×length
perimeter=2×length+2×(2/3)×length
perimeter=80
80=2×length+2×(2/3) length
40=length+(2/3) length
40=(5/3) length
length=24cm
width=(2/3)×24
=16cm
area=length×width
=24×16
=384
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