- A15
- B17
- C16
- D32
Step-by-Step Solution
Out = 40 km, stop = 0 km, back = 40 km, so total distance = 80 km over 5 hours. Average speed = km/h.
Answer: C) 16
On a distance-time graph, a courier rides out and back. From 0 to 2 hours the line rises from 0 to 40 km. From 2 to 3 hours it is flat at 40 km (a stop). From 3 to 5 hours it falls from 40 km back to 0 km.
What was the courier's average speed (km/h) for the whole 5-hour trip, counting total distance travelled (out and back)?
Class 8Reading Line GraphsCoordinate Geometry
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