in a triathlon, anna swims a distance of 1.5 km at an average spped of 2.5 km/hour , cycles 40 km in 1 1/2 (mixed fraction) and runs at an average speed of 9km/hour for 1 1/9 (mixed fraction) hours. Find her average speed during the whole competition. please show the working
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Answer:
16.038 km/h
Step-by-step explanation:
Average Speed = Total distance / Total time
Let's calculate the total distance below:
Total distance = distance he swims + distance he cycles + distance he runs
Distance = time × speed
Time = Distance / speed
Total distance = 1.5 + 40 + 10 = 51.5 km
Total time = Swimming time + Cycling time + Running time
Total time = 1 1/2 + 1 1/9 + 3/5 = 3 19/90 hours
Average speed = 51.5 ÷ 3 19/90 = 16.038 km/h
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