A car covers a distance of 480 km at a speed of 60 km/h and returns at a speed of 40 km/h. What is the average speed for the whole journey?
A48 km/h
B50 km/h
C52 km/h
D54 km/h
Explanation
Average speed for equal distances = 2xy / (x + y) = 2(60)(40) / (60 + 40) = 4800 / 100 = 48 km/h.
Exam Relevance
- Topic: Speed, Time & Distance
- Subtopic: Average Speed
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