A man walking at the rate of 5 km/hr. crosses a bridge in 15 minutes. The length of the bridge (in meters) is:
Q. A man walking at the rate of 5 km/hr. crosses a bridge in 15 minutes. The length of the bridge (in meters) is:
Answer: 1250 m
Notes: Speed of the man = 5 km/hr $latex = 5\times \frac{1000}{60}m/min = \frac{250}{3}m/min&s=1$ Time taken to cross the bridge = 15 minutes Length of the bridge = Speed $latex \times$ Time $latex = \frac{250}{3}\times 15m = 1250m&s=1$ Hence option [B] is the right answer.