CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Average Speed

a 100 metre l...

Question

a 100 metre long train takes 36/5 seconds to cross a man walking at a speed of 5 km/hr in a direction opposite to that of the train. calculate speed of the train.

Open in App

Solution

$R e l a t e d s p e e d = \frac{T o t a l d i s \tan c e}{T o t a l t i m e} = \frac{100}{36 / 5} \times \frac{18}{5} = 50 K m / h r R e l a t i v e S p e e d = S p e e d o f t r a i n (v_{t}) - S p e e d o f m a n (v_{m}) 180 = v_{t} - 5 v_{t} = 180 + 5 = 185 K m / h r$

Suggest Corrections

thumbs-up

2

Similar questions

150

metres long train crosses a man walking at the speed of

6

km/hr in the opposite direction in

6

seconds. The speed of the train in km/hr is ___________.

Q. A train 100 meters long takes 6 seconds to cross a man walking at 5km/h in a direction opposite to that of the train. The speed of the train is

Q. How many seconds will a 500 metre long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train if the speed of the train is 63 km/hr?

Q. A train is running at a speed of

45

km/hr and a man is walking at a speed of

5

km/hr in the opposite direction. If the train crosses the man in

18

seconds then what is its length ?

Q. A train running at 25 km/hr takes 18 seconds to pass a platform.Next, it takes 12 seconds to pass a man walking at 5 km/hr in the opposite direction. Find the sum of the length of the train and that of the platform?.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Average speed

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Standard VII Mathematics

Join BYJU'S Learning Program

CrossIcon