Question

450 M long train running at a speed of 60 km per hour can cross electric pole in how much time?​

Answer 1

Answer:

Speed = 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 x 3600s = 72000 m

1s x 3600s= 3600 s

Speed 72000 m/3600s =

Since 1km 1000m, we have to

72000÷1000=72km

3600s= 1h

Speed = km/h

Speed = 72km/h

Answer 2

Here the length of the train is given to be 450 m

We will first convert this length into km

450 m = 450/1000 km

           = 0.45 km

Also, the speed of the train is 60 km/hr

We have to find the time taken by the train to cross the pole

Speed = distance/time

      60 = 0.45/time

time = 0.45/60

       = 0.0075 hour

Hence, the train will take 0.0075 hour to cross the pole