Question

a goods train 400m long travelling at a speed of 45 km per hour. how long will it take to cross another train 450 M long standing at the platform?

Answer 1

Find the total distance that the train need to clear:

Total distance = length of the other train + the length of its body

Total distance = 450 + 400 = 850 m = 0.85 km

Find the time needed to cross the other train:

Speed = 45 km/h

Distance = 0.85 km

Time = Distance ÷ Speed

Time = 0.85 ÷ 45 = 17/900 h

Time = 17/900 x 60 = 17/15 min

Time = 17/15 x 60 = 68 seconds

Answer: It takes 68 seconds to cross the other train.

Answer 2

Answer:

Step-by-step explanation:

Distance to be cover =400m +450m

=850m

850m =850/1000m

=0.85m

Speed =450km/hr

Time taken to travel 1 km =0.85/45

=17/900

Time =17/900*16=17/15 minutes

Time =17 /15*60=68 seconds

HOPE IT HELPS