Question

A train 210 m long took 12seconds to pass a 90m long tunnel . Find the speed of the train.

Answer 1

to pass the tunnel completely the train has to travel a distance of 300m
so,
D=300m
T=12s
S=D/T =300/12 =25m/s

Answer 2

The correct answer is 25 m/sec.

Given: Length of train = 210m.

Length of tunnel = 90m.

Time taken to pass tunnel = 12 sec.

To Find: Speed of train.

Solution:

Total distance covered by train = 210 + 90

= 300m

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

Speed = $\frac{300}{12}$

= 25 m/sec.

Hence, the speed of train is 25 m/sec.

#SPJ2