Ashifur September 9, 2023 - 19:06
Problem: A train passes a man in 3 second, and another train from opposite direction pass the man is 4 second, both train same length. How long time need to pass the train each other?

View all: BASIC BANK LTD (CASHIR) WRITTEN QUESTION (MATH) SOLVE | 2018

Correct Answer: Time taken by the two train to cross each other is 3.42 seconds.

Explanation:

Let, length of each train be X meter

Now, we know that time taken by the train to pass a standing man is the same time to pass the length of its own.

Speed of the 1$^{st}$ train, v$_{1}$= $\frac{x}{3}ms^{-1}$

As the two trains are running in opposite direction. so we add their speed and distance

This two tram pass a distance of (x + x) meter = 2x meter with speed of $\frac{x}{3}+\frac{x}{4} ms^{-1}$

Now. we know required time = $\frac{Distance}{Speed}$

=> Time = $\frac{2x}{\frac{x}{3}+\frac{x}{4}}$ =3.42 seconds.

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