A man walking at the rate of 5 km/hr crosses a bridge in 15 min. The length of the bridge (in metres) is :

A. 600 metres

B. 750 metres

C. 1000 metres

D. 1250 metres

Answer: Option D

Solution(By Examveda Team)

$$\eqalign{ & 15\min = \frac{1}{4}{\text{hrs}} \cr & {\text{1 hr }} \to {\text{5 kms}} \cr & \frac{1}{4}{\text{hr}} \to \frac{5}{4}{\text{ kms}} \cr & {\text{So, length of the bridge}} \cr & = \frac{5}{4}{\text{ km}} \cr & {\text{ = 1250 metres}} \cr} $$