A cyclist travels for 20mins at speed of 30km/hr and for 40mins at 15km/hr find the total distance she travels. calculate her average speed
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Answer:
1) 20 minutes
30km/h
30 km = 60 min
30/3 km = 20 min
20 minutes = 10 km
40 minutes
15 km/h
15km = 60min ((60×2/3 = 40))
40 min = 15 × 2/3
40mi = 5*2 = 10 km..
therefore total distance = 20 km
speed = 20km/ 1 h
= 20km/h
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