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Two trains of length 270 m and 300 m travelling at 54 km/h and 36 km/h respectively, enter a two-track tunnel 430 m long simultaneously on different tracks and from opposite directions. After they cross each other, in how much time will the tunnel be free of the trains?

Two trains of length 270 m and 300 m travelling at 54 km/h and 36 km/h respectively, enter a two-track tunnel 430 m long simultaneously on different tracks and from opposite directions. After they cross each other, in how much time will the tunnel be free of the trains?

Grade:9

1 Answers

ABHIJEET SHUKLA
30 Points
3 years ago
After 16 seconds, trains meet. After 20 more seconds, trains cross fully. Train 1 requires 70 seconds to cross the tunnel completely. Hence, it'll take 70-(16+20)=34 seconds for the tunnel to be completely free, once trains have crossed each other.............................................

HOPE IT HELPS CHELSI !!

 

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