A man drives 180 km from city a to city bin 4 hours 10 minutes and returns to city a in 3 hours 20 minutes. find the average speed of the whole journey
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Answer:
total distance =180+180=360 km =36000m
time =4hr 10 min = 15000seconds
time taken to return city=3hr 20 min =12000seconds
average speed= total distance/total time
36000/37000=36/37
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