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Speed = total distance /total time
Total distance = 40 + 200 x 2 +40
= 480km
Time =distance / speed
Time = 3.5 + 400/60 +40/10
= 14hrs 10 mins
Average speed = 480 /(85/6)
= 33.88 km/h
joseph rimiru answered the question on October 10, 2017 at 13:57
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