Mathematics · Speed, Time and Distance
A train P going at the speed of 78 km/hr completely passes train Q of length 120 m, going in the same direction on parallel tracks, at 62 km/hr, in 4.5 minutes. How much time (in seconds) will P take to cross completely train R of length 245 m, going at 81 km/hr in the opposite direction?
- 130✓
- 249
- 315
- 428
Correct answer
30
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