Question

An athlete runs first 1/3rd part of a race at 9m/s , second
1/3rd at 6m/s and last 1/3rd at 12m/s. Find his average
speed.

Answer 1

Answer:

(9+6+12)/3

=> 27/3

=> 9 m/s

Explanation:

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Answer 2

Answer:

refer to attachment

hope it helps you