Two trains are moving in opposite directions @60 km/hr and 90 km/hr.…

Question

Two trains are moving in opposite directions @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 second is?

Accepted Answer

Option C. 48. Answer & Solution Answer: Option C Solution: & Relative speed & = (60 + 90) km/hr & = ( 150 × 518 ) m/sec & = ( 1253 ) m/sec & Distance coverd & = (1 .10 + 0 .9)km & = 2 km & = 2000 m & Required time & = ( 2000 × 3125 ) & = 48 sec