the length of a rectangular hall is 5m more than its breadth .The area of the hall is 750m2.Find the perimeter of the hall
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Answered by
22
Let b of hall= x
Length of hall= x+5
Area of hall= l*b
750= x2+5x
X2+5x-750=0
X2 +30 x -25x-750=0
X(x+30)-25(x+30)=0
X-25= 0
X+30=0
X =25
X=-30 (rejected)
Perimeter of hall= 2(l+b)
= 2( 30+25)
= 2 *55=110
Length of hall= x+5
Area of hall= l*b
750= x2+5x
X2+5x-750=0
X2 +30 x -25x-750=0
X(x+30)-25(x+30)=0
X-25= 0
X+30=0
X =25
X=-30 (rejected)
Perimeter of hall= 2(l+b)
= 2( 30+25)
= 2 *55=110
Answered by
9
Answer: Perimeter of hall is 110 m.
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