A person has to cover a distance of 6 km in 45 mins. if he covers one-half of the distance in two thirds of the total time; to cover the remaining distance in the remaining time, his speed (in km/hr) must be :
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Total distance=6km
Total time taken=45min
Time taken to cover one-half is two third of total time which mesns
3km was covered in in 30 min
Remaining distance=3km
remaining time=15min=60/15hr=1/4hr
Required speed=3/(1/4)km/hr
=(3×4)km/hr=12km/hr
Total time taken=45min
Time taken to cover one-half is two third of total time which mesns
3km was covered in in 30 min
Remaining distance=3km
remaining time=15min=60/15hr=1/4hr
Required speed=3/(1/4)km/hr
=(3×4)km/hr=12km/hr
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