Answers

2015-08-09T08:44:32+05:30
Lent the length of the train be x meters and its speed be y meters per second
then x/y=8   and x=8y
  
now   x+264/20=y
8y+264=20y
y=22
speed=22m/sec  (22*18/5)km/hr
79.2 km/hr

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