A train of length 600 m moving with the speed
144 km/hr crosses another train moving in opposite direction at the speed 240 km/hr in 15 seconds. Find the length of second train.
A1000 m
B700 m
C900 m
D1200 m
can't under stand..... plz anyone?
Ans 1:
Class : Class 8
Relative velocity of two trains is 384km/hr=320/3 m/sec.
Therefore,it can travel 1600m in 15 sec.
Therefore, the length of the second train is (1600-600)m=1000m
Ans 2:
Class : Class 8
Add up the speeds and multiply with time as trains are in opposite directions.Then subtract the length of the first train.
Ans -1000m