Practicing Success
Practicing Success
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A bus covers a certain distance travelling at a speed of 40 km/h and returns to the starting point at a speed of 60 km/h. The average speed (in km/h) for the entire journey is: |
48 20 100 50 |
48 |
Average speed = \(\frac{2 × S1 × S2 }{S1 + S2 }\) = \(\frac{2 × 60 × 40 }{60 + 40 }\) = \(\frac{4800 }{100 }\) = 48 km/h |
