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A person starting from his house covers a distance at 20 km/hr and returns to the starting place at 30 km/hr. His average speed during whole journey is

Option 1)

25 km/hr

Option 2)

24 km/hr

Option 3)

20 km/hr

Option 4)

22 km/hr

Option 5)

27 km/hr

Answers (1)

R rishi.raj

$Average\ Speed = \frac{2xy}{x+y}$

$= \frac{2*20*30}{50} = 24\ Km/hr$

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