Question

A train 140m long is running at 60kmph. In how much time will it pass a platform 260m long?

A. 15 seconds

B. 24 seconds

C. 28 seconds

D. 30 seconds

Answer 1

Hi @durag

First of all we see what is given to us 

♦ A train of length 140 m 
♦ A platform whose length 260 m
♦ The total distance covered by train to pass the platform will be 260 + 140 = 400m
♦ Speed of train 60 km/hr or $\frac{50}{3}$ m/sec

So, by the formula: $\frac{<strong></strong>Total Distance}{time take}$

We get, $\frac{400}{ \frac{50}{3} }$

= $\frac{1200}{50}$

= 24 seconds

So the correct option is (B)

Answer 2

Given,

Length of the train = 140 m
Length of the platform = 260 m

Total distance covered = 140 m + 260 m
= 400 m

Speed of the train = 60 km/hr
= 60 * (1000 / 60) m/sec
= 50 / 3 m/sec

Time taken to pass a platform = Total distance covered / Speed of the train
= 400 / (50/3) m/sec
= 1200 / 50 m/sec
= 24 m/sec Ans.

Ans.) So, the correct answer is option (B) 24 seconds.