RRB NTPC Mains or Stage 2 Model Paper 10 with solutions

Question : 31 of 120

Marks: +1, -0

Two trains 100 metres and 120 metres long are running in the same direction with speeds of 72 km/h and 54 km/h. In how much time will the first train cross the second?

50 sec
44 sec
38 sec
42 sec

Validate

Solution:

(b) Relative speed of the trains= (72 – 54) km/h = 18 km/h

=[18× 5/18] = 5

m/sec.
Time taken by the trains to cross each other= Time taken to cover (100 + 120) m at 5 m/sec

=[220/5]sec = 44

sec.

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