The length of a hall is 5 metre more than its breadth if the area of floor is of the hall is 84 metre square find the length
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Answer:
Length =12m, Breadth = 7m
Explanation:
Given
l=b+5
Also given area=84m^2.
=>lb=84
=>(b+5)(b)=84
=>b^2+5b-84=0
=>b=-12,7
Eliminating the negative value we get,
b=7m
Therefore length=7+5=12m.
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