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Question

Ravi travels the first 40% of a certain distance at a speed of 20 km/h, the next 30% at 10 km/h, and covers the remaining 30% at 12 km/h. Calculate Ravi's average speed for the entire journey in meters per second.

A 40/3 m/s

B 100/27 m/s

C 50/3 m/s

D 80/27 m/s

E None of these

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