The perimeter and area of a rectangle are 38cm and 84cm? Find the length
and breadth of the rectangle.
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Answer:
2(l+b)=38
l+b=19
b=19-l
l*b=84
l*19-l=84
19l-l²=84
l²-19l+84=0
l²-12l-7l+84=0
l(l-12)-7(l-12)=0
(l-12)(l-7)=0
l=12,7
b=7,12
hence the length and breadth of rectangle are 7and12
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