1.

A person goes from point P to point Q covergin 1/3 of the distance with speed 10km/hr, the next 1/3 of the distance at 20 km/hr and the last 1/3 of the distance at 60 km/hr. The average speed of the person is

Answer»

15 km/hr
18 km/hr
25 km/hr
30 km/hr

Solution :SINCE all the three distances are same , hence the average SPEED=`(3xx10xx20xx60)/(200+1200+600)`=18km/hr


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