the area of a rectangular land is 240 sq m, if 8m is decreased from its length,it will become a square. Determine the length and breadth of the land.
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Answer
length =20m
breadth=12m
length =20m
breadth=12m
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Step-by-step explanation:
l×b=240
b=240/l
a=l-8
l-8=240/l
l2-8l=240
l2-8l-240=0
(l-20) (l+12)=0
l=20,12
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