Rajat travels from City A to City B. He travels first 25% of the distance at 20 kmph, next 25% of the distance at half the earlier speed and the remaining distance at 80 kmph. Find his average speed for the travel.
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first distance = 20km/h
second distance = 20/2km/h=10km/h
third distance =80km/h
(20+10+80)/3 = 110/3 = 36.67km/h
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