a car travels first one third with speed of 10km/hr,next one third distance with 20km/hr.What is the average of car for whole journey
2 answers
Can't tell unless we get speed for last third.
2V1V2/V1+V2
2×10×20/10+20
400/30=10.333km/h
2×10×20/10+20
400/30=10.333km/h
3 answers