2x+2y3kmh−1
x+y3kmh−1
x+2y3kmh−1
2x+y3kmh−1
Correct answer is C
Travelled x km/h for 1 hour ∴ traveled x km in the first hour.
Traveled y km/h for 2 hours \therefore traveled 2y km in the next 2 hours.
Average speed = \frac{x + 2y}{1 + 2}
= \frac{x + 2y}{3} kmh^{-1}
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