Question

Two trains 250 m. and 300 m. long are running at the speeds of 80 km/hr, and
60 km/hr, respectively, in the same direction, on parallel tracks. Find the time req-
uired by the faster train to cross over other train,
b) 10 seconds 199 seconds d) 9 seconds
a) 12 seconds​

Answer 1

Answer:

The correct answer is: d) 9 seconds

Thus, the faster train took 9 seconds to overtake the other longer train.

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Answer 2

Answer:

Answer-: 41.8 sec

Step-by-step explanation:

Relative speed of trains = (80-60) km/hr

= 20 km/hr

= 20 × 5/18 m/sec

Note-: Change km/hr to m/sec

= 5 m/sec

Time taken by the train to clear off each other = sum of length of trains/relative speed of trains

= (10+ 199/5 sec

= 209/5 sec

= 41.8 sec

Ans-: 41.8 sec