A man walking at the rate of 5 km/hr crosses a bridge in 15 minutes. What is the length of the bridge in metres?
1250
1280
1320
1340
Explanation:
Speed = 5 km/hr
Time = 15 minutes = $\dfrac{1}{4}$hour
Length of the bridge = Distance Travelled by the man = $Speed \times Time = 5 \times \dfrac{1}{4}$km
= 5$\dfrac{1}{4} \times 1000$ metre= 1250metre