Question

A train is moving at a speed of 144 kmph, if length of the train is 120 m, how long will it take to cross a railway plot form of 160 m long is

Answer 1

Answer:

7.5

Step-by-step explanation:

As we need to calculate answer in seconds, so first convert speed into meter/sec.

we know 1 km/hr = 1*(5/18) m/sec

So, Speed = 132* (5/18) = 110/3 m/sec

Distance need to be covered in passing the platform =

Length of train + length of platform = 110 + 165

= 275 meters

Time = Distance/Speed

\begin{aligned}

=> Time = 275* \frac{3}{110} = \frac{15}{2} \\

= 7.5 seconds

Answer 2

Step-by-step explanation:

first convert 144kmh into meter /second

for this (144×5)÷18=40m/s

speed = distance /time

40=(120+160)÷t

t=280÷40

t=7sec