train travel at a speed of 60 km per hour for 0.25 hours and 30 km hr for next 0.24 hours and 70 km hour for next 0.71 hours calculate the average speed
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1st time distance =60x0.25=15km
2nd_____________ =30x0.24=7.2km
3rd_____________ =70x0.71=49.7km
now, average speed=Total distance/total time
=71.9/1.2
=59.92
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