Question

two platforms length 96 and 141 metres and train crossed those platforms in12sc and 15 sec respectively what is the length of train​

Answer 1

Answer:

Length of train = 84 m

Step-by-step explanation:

In the question,

Length of Platform 1 = 96 m

Length of Platform 2 = 141 m

Time taken by the train to cross the platform 1 = 12 seconds

Time taken by the train to cross the platform 2 = 15 seconds

Now,

Let us say the length of the train is = l

So,

$Time=\frac{Distance}{Speed}\\12=\frac{96+l}{s}\\12s=96+l\ ...........(1)$

Also,

$Time=\frac{Distance}{Speed}\\15=\frac{141+l}{s}\\15s=141+l\ ...........(2)$

So, on solving the equations (1) and (2) we get,

3s = 45

s = 15 m/s

Now,

So, the length of the train is 84 m.