A car covers first half distance between two places at speed of 40kmph and second half at 60 kmph The average speed of car is
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The average speed is distance/time.
Suppose the distance is 120km.
The first half of the trip takes 120km / (40 km/hr) = 3 hrs.
The second half takes 120/60 = 2 hrs.
So the average speed is
(120 km + 120 km) / (3 hrs + 2 hrs) = 48 km/hr
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