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

A man walking at the rate of 5 km/hr. crosses a bridge in 15 minutes. The length of the bridge (in meters) is:
[A]1000 m
[B]1250 m
[C]600 m
[D]750 m

1250 m
Speed of the man = 5 km/hr
= 5\times \frac{1000}{60}m/min = \frac{250}{3}m/min
Time taken to cross the bridge = 15 minutes
Length of the bridge = Speed \times Time
= \frac{250}{3}\times 15m = 1250m
Hence option [B] is the right answer.

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