Question

The length of a rectangular field is twice its breadth ,meghna jogged around 5 times and covered a distance of 3km what is the length of the field

Answer 1

Let breadth = x
and length =2x

perimeter = 2(2x+x) =6x
and by question

5×6x =3km=3000m
X= 3000/30
X=100m

length=200m
breadth =100m

Answer 2

let,

breadth of the rectangle to be x

then,

length of the rectangle is 2x

now distance cover by Meghna around the field for 5 times = 3km

=> 5 time of perimeter of rectangle = 3 km

so now,

2 ( l + b ) × 5 = 3

2 ( 2x + x ) × 5 =3

10 ( 3x ) = 3

3x = 3/10

x = 3/( 10 × 3)

x = 0.1

there fore the length of the field is 2x = 2 × 0.1s = 0.2km

breadth = 0.1 km

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