Question

The length of a rectangular is thrice the breadth if it's perimeter is 144 meter find its length and breadth

Answer 1

let the breadth be x

therefore length =3x

Formula of perimeter=2(l+b)

perimeter =144m

2(x+3x)=144

2*4x=144

$x=\frac{144}{8}$

x=18m

3x=3*18=54m

length=54m

breadth=18m

Answer 2

Answer:

length=(3x) and breadth = (x)

perimeter = 144m

P=2(l+b)

144=2(3x+x)

144=2*4x

144/2=4x

72=4x

72/4=x

18=x

Now,length=(3x)=(3*18)=54

breadth=(x)=18

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