Question

two trains ABC and PQR,travelling in opposite directions (towards each other)can completely cross each other from the moment they meet in 9 seconds.the length of train ABC and train PQR are 299m and 306 m .if the speed of train PQR is 122kmph ,what is the speed of train ABC​

Answer 1

Answer:

As the trains travel in opposite direction then

Relative speed=(45+36)km/hr=(81×

18

5

)m/sec=(

18

405

)m/sec

∴ length of the faster train=

18

405

×8=180m

Answer 2

Answer:

180 m

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