a rectangle has a perimeyer of 48 cm.if the length is three times as long as its breadth,then find its length and breadth.
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Answer:
perimeter=48 cm
2(l+b)=48
l+b=24
3b+b=24. (l=3b)
4b=24
b=6 cm
l=3b=3*6=18cm.
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