Question

find the time taken by an express train of length 450m having speed of 86 kilometre per hour to overtake a goods train of length 675 m having speed 32 km/h going in the opposite direction on a parallel direction​

Answer 1

Answer: 2.68 sec

Step-by-step explanation:

total distance =450 +675 = 1125 m

since the train going in opposite direction their speed add up.

so total speed = 86+ 32 km/h = 118 km/h

we need to change 118 km/h to m/sec

118km / h = (118/1000) / (1/60×60)

= (118×60×60)/ 1×1000

= 424800/1000

=424.800 m/s

=424.8 m/s

therefore time taken to cross 1125 m with 424.8 m/s speed is .....

1125 /424.8

= 2.68 second