Question

the length of a rectangular field is 4 times its breadth if the perimeter of this field is 800 metre then what is the length of the field
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Answer 1

Answer:

Step-by-step explanation:

I=4b

Perimeter of rectangle=2(l+b)

2(l+b)=800

2(l+4l)=800

5l=400

l=80

Answer 2

the length of the field is 320 meter

let the length of the field is X

let the breath of the field be Y

therefore Perimeter= 2(X+Y)

2(X+Y)=800 meter

X+Y=400

length=4(breath)

X=4Y(given)

X+Y=400

4Y+Y=400

5Y=400

Y=80 meter

length=X=4Y

length=  X =4*80

length=  X=320 meter