The length of a rectangular field is twice its breadth. Jamal jogged around it four times and covered a distance of 6km. What is the length of the field?
Given:
length, l = 2 × breadth, b
Distance covered after 4 times of jogging = 6 km
Perimeter of field = 6 / 4
= 1.5 km or 1500 m
Perimeter = 2 × (l + b)
2 × (l + b) = 1500
2 × (2b + b) = 1500
2 × 3b = 1500
6b = 1500
b = 250 m
Length, l = 2 × 250
Length = 500 m