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Two trains of equal length of 140 meters are running in the same direction at the speed of 20 km/hr and 34 km/hr. How much time will it take to cross the slow train?
- A68 sec
- B78 sec
- C84 sec
- D72 sec
Answer not set
Discussion 1
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CCommunity
Let Speed of both trains are ST1 and ST2
⇒ ST1 - ST2 = (Total distance)/Time
⇒ 5/18 × (34 - 20) = (140 + 140)/Time
⇒ 5/18 × 14 = 280/Time
∴ Time = 18 × 4 = 72 seconds
⇒ ST1 - ST2 = (Total distance)/Time
⇒ 5/18 × (34 - 20) = (140 + 140)/Time
⇒ 5/18 × 14 = 280/Time
∴ Time = 18 × 4 = 72 seconds