5
Two trains of lengths 75m and 95m are moving in the same direction at 9 m/s and 8 m/s respectively. What is the time taken by the faster train to cross the slower train?
- A120 seconds
- B130 seconds
- C150 seconds
- D170 seconds
Answer not set
Discussion 1
Log in or create a free account to reply and vote.
0
CCommunity
Since, both the trains are going in the same direction,
∴ Relative speed = (9 – 8) m/s = 1 m/s
Note: When a train passes a platform or a long object, the distance travelled by the train, while crossing that object, would be equal to the sum of the lengths of the train and length of that object.
∴ Sum of the lengths = 75 + 95 = 170m
We know that:
Speed = Distance/Time
∴ Time required to cross the slower train by faster train = 170/1 = 170 s
Hence, the required time for faster train to cross the slower train is 170 seconds.
∴ Relative speed = (9 – 8) m/s = 1 m/s
Note: When a train passes a platform or a long object, the distance travelled by the train, while crossing that object, would be equal to the sum of the lengths of the train and length of that object.
∴ Sum of the lengths = 75 + 95 = 170m
We know that:
Speed = Distance/Time
∴ Time required to cross the slower train by faster train = 170/1 = 170 s
Hence, the required time for faster train to cross the slower train is 170 seconds.