Question

Two train A & B each 66 meters long run parallel to each other in the same direction. Their

speeds are 50 Kmph and 30 Kmph respectively. In what time A will completely pass B.

(a) 28 Sec (b) 28.46 Sec (c) 53.46 Sec (d) 23.76 Sec​

Answer 1

Answer:

Given :

Two trains A and B  runs parallel to each other in the same direction. their speeds are 50 kmph and 30 kmph respectively

Length of each train=66m

Relative speed of trains A and B  =50-30=20km/hr=20x5/18 = 50/9m /s

Distance covered By slower train A

=Length of train A +length of faster train B

Disatance=66+66=132m

Time taken by the slower train to completely pass the faster train =Distance/time=132/50/9=132x9/50=23.76sec

∴ Time taken By train A to completely pass Train B is 23.76 sec