Gautam goes office at a speed of 12 kmph and return...

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Gautam goes office at a speed of 12 kmph and return homes at 10 kmph. His average speed is :

A. 11 km/hr

B. 22 km/hr

C. 10.9 km/hr

D. 12.5 km/hr

Answer: Option C

Solution(By Examveda Team)

Average speed = $$\frac{2xy}{x + y}$$
x = 10 km/hr
y = 12 km/hr
Average speed = $$\frac{{2 \times 10 \times 12}}{{\left( {10 + 12} \right)}}$$
∴ Average speed = 10.9 km/hr

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