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dangina [55]
3 years ago
6

during first half of the journey a body travels with speed of 40km/hrs and in next half it travels with speed of 20km/hrs.Calcul

ate the average speed of the whole journey
Social Studies
1 answer:
ANTONII [103]3 years ago
8 0
It covers a distance of 80 km
in first half it takes 1 hr to cover 40 km at speed of 40 kmph
in second half it takes 2hr to complete 40 km at speed of 20kmph
so average speed is 80/3 kmph
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