3 person A, B and C covers a distance at 10 km/hr ,12 km/hr and 15 km/hr. the average speed is:
11 km/hr
12 km/hr
9 km/hr
14 km/hr
7 km/hr
Average Speed = 3xyz)/(xy + yz + zx)
= (3 x 10 x 12 x 15)/(120 + 150 + 180) => 12 K/hr
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Average Speed = 3xyz)/(xy + yz + zx)
= (3 x 10 x 12 x 15)/(120 + 150 + 180) => 12 K/hr