How many seconds will a boy take to run one complete round around a square field ofside 55 metres, if he runs at a speed of 18 km/h?

Correct option is C

Given:

Side of square field = 55 m

Speed = 18 km/h

Formula Used:

Perimeter of square = 4 × side

Time = $$\frac{\text{Distance}}{\text{Speed}}$$​​

Solution:

Perimeter = $$4 \times 55 = 220 \text{ m}$$​​

Speed = $$18\times\frac{5}{18} =$$​5 m/s

Time = $$\frac{220}{5} = 44 \text{ seconds}$$​​