Question

how long will a train , 120 m long, take to clear a platform, 130 m long, if its speed is 50km/hr

Answer 1

Answer:

converting speed km/h in m/s

= 50×5/18

= 13.9 m/s (approx)

time taken to clear 130m long platform

= 130/13.9 sec

=. 9.35 seconds

Answer 2

Answer :-

Time = 18 s

Given:-

• Length of train = 120m

• Length of Platform = 130 m

• Speed of train = 50 km/h

To find :-

• Time taken by a train to pass the platform

Solution :-

Total Distance = Length ot Train + Length of platform

Total Distance =120 + 130 = 250m

Speed = 50 km/h

We have to change it in m/s:-

$50 \times \frac{5}{18} = \frac{250}{18} = \frac{125}{9}$

= 125/9 m/s

We know that,

Time = Distance / Speed

$= > \frac{250}{ \frac{125}{9} } \\ \\ = > 250 \times \frac{9}{125} \\ \\ = > 9 \times 2 = 18$

Time = 18s