How many seconds will a boy take to run one complete round around a square field of side 38 metres, if he runs at a speed of 6 km/h?

Given:

Side of the square field = 38 metres.

Speed of the boy = 6 km/h.

Formula Used:

Time taken to complete one round = Distance / Speed

Calculation:

Distance covered in one round = Perimeter of the square field

Perimeter = 4 × Side = 4 × 38 = 152 metres

Speed of the boy in m/s = Speed in km/h × (1000 / 3600)

Speed = 6 × (1000 / 3600) = 5/3 m/s

Time taken = Distance / Speed

⇒ Time taken = 152 / (5/3) = 152 × (3/5)

⇒ Time taken = 456 / 5 = 91.2 seconds

The boy will take 91.2 seconds to complete one round around the square field.