Question

Two trains are moving in opposite directions at 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is ?
A) 42 sec
B) 44 sec
C) 46 sec
D) 48 sec

Answer 1

Answer:

Step-by-step explanation:

Option C

Explanation:

Relative speed = (60+ 90) km/hr

  =150 x  5  m/sec

18 =   125  m/sec.

3

Distance covered = (1.10 + 0.9) km = 2 km = 2000 m.

Required time =   2000 x  3  sec = 48 sec.

125