Question

A train 450 metre long crosses a pole in 22.5 seconds what is speed of train in kilometre per hour

Answer 1

Answer:

72km/h

Step-by-step explanation:

450m /22.5 s = 20m per s

Speed = 20 m/s

1000m = 1km

60s = 1 minute(min)

60min = 1 hour (h)

1 h = 3600s

Solution:

Speed = 20 m /s:

20 m × 3600s = 72000 m

1s × 3600s = 3600 s

Speed = 72000 m/3600s

Since 1km = 1000m, we have to

72000/1000= 72km

3600s= 1h

Speed = km/h

Speed = 72km/h

hope it helps u.........