Question

A train 150 m long passes a tree in 12 seconds. how long will it take to pass a tunnel 250 m long?

Answer 1

time taken to cross the tree is 12 sec

Answer 2

Answer:

The train will pass a tunnel 250 m long in 32 seconds.

Step-by-step explanation:

It is given that a train 150 m long passes a tree in 12 seconds.

Speed of train is

$Speed=\frac{Distance}{Time}$

$Speed=\frac{150}{12}$

$Speed=12.5m/s$

Total distance covered by train is

$\text{Total distance}=150+250=400m$

$Time=\frac{Distance}{Speed}$

$Time=\frac{400}{12.5}$

$Time=32$

Therefore the train will pass a tunnel 250 m long in 32 seconds.