Question

5.
A train 280 metres long is running at a speed of 42 km/hr. How much time will it
take to pass a man standing on a platform?
6.
A train 350 metres long crosses an electric pole in 28 seconds. Find the speed of
the train in km/hr.
7.
A train 150 m long is running at 72 km/hr. It crosses a bridge in 13 seconds. Find
the length of the bridge.
8.
How long will a train, 120 m long, take to clear a platform, 130 m long, if its
speed is 50 km/hr?
9.
A train 210 m long took 12 seconds to pass a 90 m long tunnel. Find the speed of
the train.
10. A train 270 m long is running at 80 km/hr. How much time will it take to cross
platform 130 m long?​

Answer 1

5. Length of the train is 280 m equal to distance travel.

According to the question

Distance Travelled= 280 m

Speed of the train = 42km/h= 700/60m/s

Using the formula Time = Distance/Time

= 280÷700/60

= 280×60/700

= 16800/700

= 24s  

Therefore, answer: - Train will take 24 seconds to pass a man standing on the platform.

6.Answer: The train speed is 45 km/hr.

Given: Length of the train is 350 m which is considered as distance.

The time required by the train to cross the electric pole = 28 seconds

Solution:

By formula, Speed =

Speed of the train =   = 12.5 m/sec

To convert m/sec into km/hr multiply by the value  = 45 km/hr

The speed travelled by train is 45 km/hr.