Question

Length of a rectangular field is twice its breadth.Megha is jogging 5 times and covering the length of 3 km. What is the length of field

Answer 1

let breath be X length=2x then, perimeter=5×2l+b =5×6x=30x 3x=30. X=10 breath=10, length=2×10=20

Answer 2

Answer:

In completing one round of the field distance covered is equal to the perimeter of the field.

∴ Distance covered in 5 rounds = 5 x Perimeter

= 5 x 2 ( l + w )

= 10 x ( l + w)

= 10 x ( 2w + w ) [ length = l = 2w ]

= 10 x 3w

= 30 w

But, the total distance covered is given = 3 km = 3000 m.

∴ 30 x w = 3000

⇒ w = 3000 / 30

⇒ w = 100 m

⇒ Length = 2 w = 2 x 100 = 200 m

$hope \: its \: help \: u$