2009 · Q9
A boy travels a distance of 8 km at the rate of 4 km/h, 6 km at the rate of 3 km/h and 4 km at the rate of 2 km/h. What is the average speed for the entire journey?
Elementary MathematicsStatistics
- A2 km/h
- B3 km/h
- C4 km/h
- D6 km/h
Explanation
18 km in 6 h; average speed 3 km/h.