Latest Infosys Aptitude Question SOLUTION: a train passes two cars moving in the direction at 45km/hr and 50km/hr in 36 sec and 54 sec respectively. What is the length of the train?

• Placement Papers
• /
• Infosys
• /
• Numerical Ability
• /
• Time Distance and Speed

Infosys Question Papers: Infosys Interview Experience(10) INFOSYS Company Profile

(#M40004693) INFOSYS Numerical Ability question infosys latest puzzle Keep an EYE

a train passes two cars moving in the direction at 45km/hr and 50km/hr in 36 sec and 54 sec respectively. What is the length of the train?

Asked In Infosys (13 years ago)

Unsolved Read Solution (2)

Is this Puzzle helpful?   (4)   (3) Submit Your Solution Time Distance and Speed

Read Solution (2) :

ragu  (6 years ago)

Let us assume::
the length of train is x km.
the velocity of the train is v km/h.

Case A:: Car A.
Velocity is 45km/h.
Time is 36 secs = 36/3600hr = 0.01 hr.
Since train crosses the cars, v is greater than velocity of car.
so the net velocity is (v-45)kmph.
Distance=speed*time.
Here the distance covered is nothing but length of train.
Therefore
x = (v-45)*0.01 ...............................(1)
Similarly from car 2:
x = (v-50)*0.015...............................(2)

Divide and solve for v,from the above equations,
v=60 kmph.
put in (1).
x=(60-45)*0.01
x=0.15 km
Hence x = 150 m
Therefore the length of train is 150 m.

Is this solution Helpfull? Yes (1) | No   

Kumari Pallavi  (10 years ago)

1200m
distance=speed*time
45*518*36+50*518*54
1200

Is this solution Helpfull? Yes | No (2)  

Please Login to Read Solution.