Question
Download Solution PDFA train passes a bridge in 18 seconds and a man standing on the bridge in 10 seconds. If the speed of the train is 90 km/hr, what is the length of the bridge ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Speed of the train = 90 km/hr = (90 × 1000) / 3600 = 25 m/s
Time taken to pass the man = 10 seconds
Time taken to pass the bridge = 18 seconds
Formula Used:
Total Length of Train + Length of Bridge = Speed × Time to pass the bridge
Length of Train = Speed × Time to pass the man
Calculation:
Length of Train = Speed × Time to pass the man
⇒ Length of Train = 25 × 10
⇒ Length of Train = 250 m
Total Length of Train + Length of Bridge = Speed × Time to pass the bridge
⇒ 250 + Length of Bridge = 25 × 18
⇒ 250 + Length of Bridge = 450
⇒ Length of Bridge = 450 - 250
⇒ Length of Bridge = 200 m
The length of the bridge is 200 m.
Last updated on Feb 11, 2025
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