Average speed over a whole journey
Average speed over a whole journey.
- Average speed = total distance ÷ total time.
- Use compatible units before substituting.
- Rearrange to distance = speed × time or time = distance ÷ speed when needed.
Example 1
A journey covers 30 km in 30 minutes, then 45 km in 90 minutes. Find the average speed for the whole journey.
Example 2
A journey covers 31 km in 30 minutes, then 47 km in 90 minutes. Find the average speed for the whole journey.
Your turn
A journey covers 32 km in 30 minutes, then 49 km in 90 minutes. Find the average speed for the whole journey.
Check answer
A journey covers 33 km in 30 minutes, then 51 km in 90 minutes. Find the average speed for the whole journey.
Check answer
A journey covers 34 km in 30 minutes, then 53 km in 90 minutes. Find the average speed for the whole journey.
Check answer
A journey covers 35 km in 30 minutes, then 55 km in 90 minutes. Find the average speed for the whole journey.
Check answer
A journey covers 36 km in 30 minutes, then 57 km in 90 minutes. Find the average speed for the whole journey.
Check answer
A journey covers 32 km in 30 minutes, then 49 km in 90 minutes. Find the average speed for the whole journey.
AnswerA journey covers 33 km in 30 minutes, then 51 km in 90 minutes. Find the average speed for the whole journey.
AnswerA journey covers 34 km in 30 minutes, then 53 km in 90 minutes. Find the average speed for the whole journey.
AnswerA journey covers 35 km in 30 minutes, then 55 km in 90 minutes. Find the average speed for the whole journey.
AnswerA journey covers 36 km in 30 minutes, then 57 km in 90 minutes. Find the average speed for the whole journey.
Answer