A 120 m long train is moving in a direct...

A 120 m long train is moving in a direction with speed 20 m/s . A traing B moving with 30 m/s in the opposite direction and 130 m long crosses the first train in a time

36s

38s

None of these

Text Solution

Verified by Experts

The correct Answer is:

Relative velocity of A w.r.t. B = 20 - (-30) = 50 m/s
time = `(120 + 130)/(50) = 5sec`

Topper's Solved these Questions

MOTION IN ONE DIMENSION
ERRORLESS|Exercise NCERT BASED QUESTIONS (MOTION UNDER GRAVITY )|56 Videos
MOTION IN ONE DIMENSION
ERRORLESS|Exercise PAST YEARS QUESTIONS|26 Videos
MOTION IN ONE DIMENSION
ERRORLESS|Exercise NCERT BASED QUESTIONS (NON-UNIFORM MOTION )|104 Videos
KINETIC THEORY OF GASES
ERRORLESS|Exercise ASSERTION AND REASON |16 Videos
MOTION IN TWO DIMENSION
ERRORLESS|Exercise ASSERTION & REASON|19 Videos

Similar Questions

Explore conceptually related problems

One train A 100m long is moving in a direction with a speed of 20m/s . Another train B 150m long is moving with a speed of 30m/s in the opposite direction.The train B crosses the train A in a time A) 5s B) 10s C) 18s D) None of these

A train 350 m long is moving at the speed of 20 km/h it will cross a man coming from the opposite direction at the speed of 1 km/h in:

A train 350 m long is moving at the speed of 20 km/h. It will cross a man coming from the opposite direction at the speed of 1 km/h in ?

A 150 m long train is moving in north direction with a velocity of 5m/s and a parrot is also moving in north direction with a velocity of 10 m/s, then find out (i) The time taken by parrot to cross the train (ii) Distance travel by the parrot during the crossing.

A train 180 m long moving at the speed of 20 m/sec.Over-takes a man moving at a speed of 10m/sec in the same direction .The traiin passes the man in:

A 100 m long train is moving at a speed of 60 km/h. Then, the train will cross a signal pole in

A 120 m long train is moving towards west with a speed of 10 m//s . A bird flying towards east with a speed of 5 m//s crosses the train. The time taken by the bird to cross the train will be

ERRORLESS-MOTION IN ONE DIMENSION-NCERT BASED QUESTIONS (RELATIVE MOTION )

Two trains, each 50 m long are travelling in opposite direction with v...
Text Solution
|
A 120 m long train is moving in a direction with speed 20 m/s . A trai...
Text Solution
|
A 210 meter long train is moving due north at a of 25 m/s. a small bir...
Text Solution
|
A police jeep is chasing with, velocity of 45 km//h a thief in another...
Text Solution
|
A boat crosses a river with a velocity of 8(km)/(h). If the resulting ...
Text Solution
|
A train is moving slowly on a straightly track with a constant speed o...
Text Solution
|
A train is moving towards east and a car is along north,both with same...
Text Solution
|
An express train is moving with a velocity v1. Its driver finds anothe...
Text Solution
|
Two trains are moving with equal speed in opposite directions along tw...
Text Solution
|
In figure, one car is at rest and velocity of light from head light is...
Text Solution
|
Two cars A and B are moving with same speed of 45km/h along same d...
Text Solution
|
A boat moves with speed of 5 km/h relative to water in a river flowing...
Text Solution
|
A river is flowing from west to east with a speed of 5 m//min. A man c...
Text Solution
|
A boat crosses a river from port A to port B, which are just on the op...
Text Solution
|
For a body moving with relativistic speed, if the velocity is doubled,...
Text Solution
|
Two car A and B travelling in the same direction with velocities v1 an...
Text Solution
|
Two trains A and B of length 400 m each are moving on two parallel tra...
Text Solution
|
Particle A moves along X-axis with a uniform velocity of magnitude 10 ...
Text Solution
|