Question

THE LENGTH OF RECTANGLE FIELD IS THRICE ITS BREATH AND ITS PERIMETER IS 240M. THE LENGTH OF THE FIELD IS

Answer 1

length=3b ........(1)
breadth=b
perimeter=2(l+b)
240=2(l+b)
put the value of length
240=2(b+3b)
240/2=4b
120/4=b
30m=b
put the value of b in equation (1)
l=3b
l=3(30)
l=90m

Answer 2

perimeter of a rectangle= 2(l+b) =240m

breadth=b
length=3b

P=2(l+b)=240m
but length is equal to 3b then,
   P=2(3b+b)=240m

2(3b+b)=240m
4b=240/2
b=120/4=30m

So,
length(3b) will be equal to 3×30=90m.
 
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