a train of length 320 meters is running at a speed of 72km/hr. how much time will it take to cross a pole?
Answers
Step-by-step explanation:
First of all convert the speed to SI unit.
Speed of train = 72 km/h =72000 m/h
=72000 m/3600 s= 20 m/s
For the train just to cross the electric pole, it has to move through a distance equal to its length 60 m.
Explanation: Let us assume that the front part of the train is at the electric pole.
For the train to pass the pole, the rear part must move forward and just reach the pole.
It means, the train will pass its own length of 60 m to pass the pole.
Time taken to cross = distance travelled/time taken = length of the train / speed of train
= 60 m/20 m^s-1 =3 s
hope it will help u.....
Answer:
a train of length 320 meters is running at a speed of 72km/hr. The train takes 16 seconds to cross the pole.
Step-by-step explanation:
To cross a pole, the train covers a distance equal to its length.
So, the disatnce covered by the train is therefore equal to 320 meters.
The speed of the train = 72 km/h
We need to convert this to m/s since the distance is given in meters.
Speed in m/s = 72 × 5/18 = 20 m/s
Given distance and speed, the formula for getting time is:
Time = distance / speed
= 320/20 = 16 seconds
the train takes 16 seconds to cross the pole.