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3 person A, B and C covers a distance at 10 km/hr ,12 km/hr and 15 km/hr. the average speed is:

Option 1)

11 km/hr

Option 2)

12 km/hr

Option 3)

9 km/hr

Option 4)

14 km/hr

Option 5)

7 km/hr

Answers (1)

R rishi.raj

Average Speed = 3xyz)/(xy + yz + zx)

= (3 x 10 x 12 x 15)/(120 + 150 + 180) => 12 K/hr

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