SOLUTION: A man goes form his home to his office at the speed 20 km/h and returns form his office to home at the speed of 30 km/h . his mean speed is ?

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Question 322085: A man goes form his home to his office at the speed 20 km/h and returns form his office to home at the speed of 30 km/h . his mean speed is ?
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
"mean" is just the "average of"
so %2820%2B30%29%2F2
50%2F2
25
25km/h