A cyclist travels 45 km in 2.5 hours, then rests for 30 minutes, then travels 30 km in 1.5 hours. What is the average speed for the entire trip (including rest)?
Answer
20 km/h
How to solve it
1
Total distance: 45 + 30 = 75 km
2
Total time: 2.5 + 0.5 + 1.5 = 4.5 hours
3
Average speed: 75 ÷ 4.5 = 16.67 km/h
Hints
Include rest time in total
Divide total distance by total time