A 250 metre long train travels at a speed of 90 km/h.How far will it go in one second?How much time would it take to pass a signal light in the railway station.What is the time taken by the train to cross at 225 metre long platform?
Answers
Answer:
Step-by-step explanation:
Given a 250 m long train travels at the speed of 90km/h
Let the length of the train be 'l' = 250m
Let the speed of the train be 'v' = 90 km/hr
= 25 m/s
(1 km =1000 m, 1 hr = 3600 s, so 1 m/h = 1000/3600 =5/18
=>90 km/h = 90*5/18 = 25 m/s)
In 1 sec , the distance traveled by train = speed * time
=25*1
=25 m
2) To pass a signal light , train has to cover its entire length
hence we know distance = speed * time
So to calculate time which is equal to
distance/speed
= 250/25
=10 sec
3)Train to cross a 225 m long platform, it has to cover the entire length of the platform + length of the train itself
So total distance, the train has to cover is 225 + 250 = 475 m.
Now, to calculate the time taken to travel
= Distance/Speed
=475/25
=19 s
Answer:
19 s is the required answer