To arrive on schedule, a train is to cover a distance of ...
To arrive on schedule, a train is to cover a distance of 60km at 72km/hr. If it starts 10 minutes late, at what speed must it move to arrive on schedule?
60km/hr
80km/hr
90km/hr
108km/hr
Correct answer is C
speed=distancetime72=60timet=6072=56hr
time lost = 10mis =1060hr=16
Time required for the journey
=56−16=23speed=60÷23=90km/hr
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