Two bullet train s 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 bullet train to cross the faster bullet train in seconds is:
Options
A) 58 sec. B) 78 sec. C) 68 sec. D) 48 sec. E) 88 sec.
D   48 sec.   Relative speed = (60+ 90) km/hr   = 150x5/18   = 120/3 m/sec   Distance covered = (1.10 + 0.9)= 
<gadget id="calculator">(1.10 + 0.9)</gadget>
<output>2</output>
2 km= 2000 m.   Required time = 2000 x 3/125 = 48 sec.
<result>D</result>
Two bullet train s 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 bullet train to cross the faster bullet train in seconds is: