Question

A train 200 metres long and travelling at a speed of 60km/h will cross a pole in

Answer 1

Answer:

time=distance/speed

=200/60×5/18

= 200×3/50

=12sec

Answer 2

Answer:

12 sec

Step-by-step explanation:

For answering these types of questions just consider 2–3 points

Firstly to cross the pole train has to cover its whole length

So total distance covered = length of the train

The second point is you have to see the units are the same or not

Here distance is in meter and speed is in km/hr and you have to find time in sec.

So for that make all the units the same.

Speed of train = 60km/hr

= 60*(5/18) simple way of changing km/hr to m/sec

Now the formula

Speed = distance / time

60*(5/18) = 200/time

300/18 = 200/time

time = 200*18/300

time =12 sec

Train will cross pole in 12 sec.