SOLUTION: A train,120m long,travelling at 78km/hr overtakes another train in the same direction at 60km/hr and passes it completely 70seconds.find the length of the 2nd train.

Question 645393: A train,120m long,travelling at 78km/hr overtakes another train in the same direction at 60km/hr and passes it completely 70seconds.find the length of the 2nd train.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A train, 120m long,traveling at 78km/hr overtakes another train in the same
direction at 60km/hr and passes it completely 70 seconds.
find the length of the 2nd train\
:
let x = the length of the 2nd train.
Change the speeds into meter/sec
= 21.67 m/sec
= 16.67 m/sec
:
Write a time equation, time = dist/speed
:
Length of the two trains divided by the relative speed = 70 seconds
= 70
:
= 70
120 + x = 5(70)
x = 350 - 120
x = 230 meters the length of the 2nd train
RELATED QUESTIONS
two hours after a freight train leaves the station a passenger train leaves the same... (answered by josgarithmetic)

a train travelling 110m long is travelling at 60 km/hr in what time it will cross a... (answered by ankor@dixie-net.com)

A train 600 metre long passes a car running at 72 km/hr in same direction in which the... (answered by ankor@dixie-net.com)

A passenger train leaves a train station on schedule. A freight train had departed from... (answered by Theo,greenestamps,MathTherapy)

How many seconds will it take for a train 300 meters long travelling at 100 km/hr to pass (answered by Fombitz)

Can you help? Train A&B traveling in the same direction, train A is traveling at 60 miles (answered by ankor@dixie-net.com)

Train A and B are travling in the same direction on parallel tracks, Train A is... (answered by ankor@dixie-net.com)

How much time does a train 50m long moving at 65 km/hr take to pass another train 75 m... (answered by lwsshak3)

A train 600 metre long passes a car running at 72 km/hr in the same direction in which... (answered by KMST)