CAT 2021 Time, Speed and Distance Question (Medium)

Question

Two trains cross each other in 14 seconds when running in opposite directions along parallel tracks. The faster train is 160 m long and crosses a lamp post in 12 seconds. If the speed of the other train is 6 km hr less than the faster one, its length, in m, is

Accepted Answer

Step 1 Speed of faster train Length of faster train 160 m Time to cross lamp post 12 s Speed 160 12 40 3 m s Step 2 Speed of slower train Difference 6 km h 6 5 18 m s 5 3 m s Speed of slower train 40 3 5 3 35 3 m s Step 3 Condition when trains run in opposite directions Time to cross each other 14 s

CAT 2021

Quantitative

Time, Speed and Distance

Medium

Two trains cross each other in 14 seconds when running in opposite directions along parallel tracks. The faster train is 160 m long and crosses a lamp post in 12 seconds. If the speed of the other train is 6 km/hr less than the faster one, its length, in m, is

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