Mathematics · Speed, Time and Distance
A car covers the first half of its journey distance with a speed v1 and the remaining second half distance with a speed v2. The average speed of the car for the entire journey is given by:
- 12v1v2 / (v1 + v2)✓
- 2(v1v2) / (v1 + v2)
- 3√(v1v2)
- 4(v1 + v2) / 2
Correct answer
2v1v2 / (v1 + v2)
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