UPSC CDS Math Speed, Time and Distance Questions

Question : 43 of 53

Marks: +1, -0

A car travels the first one-third of a certain distance with a speed of 10 km/hr, the next one-third distance with a speed of 20 km/hr and the last one-third distance with a speed of 60 km/hr. The average speed of the car for the whole journey is