Question

a train 120 metres long is running at a speed of 50km/hr. what time will it take to cross a 130 metre long Bridge

Answer 1

Solution:-
Speed=50km/h
In order to convert it in m/s,we will have to multiple it with 5/18
So,
$= > 50 \times \frac{5}{18}$
$= > \frac{125}{9}$
=125/9 m/s
Total distance =130+120=250m
Now,
$time = \frac{distance}{speed}$
$time = \frac{250}{ \frac{125}{9} } \\ time = \frac{250 \times 9}{125} \\ time = 18$
Hence,it will take 18 second to cross a 130m long bridge.