Asked by j

if someone walks 5km in 21 minutes and then 4 km in 39 minutes then whats his average speed
Answered by Damon
9 kilometers in 60 minutes
= 9 kilometers/ hour
Answered by Ms. Sue
9 km in 60 minutes = 9 kph
Answered by Steve
avg speed is total distance divided by total time:

(5+4)/(21+39) km/min = 9 km/hr

That's a pretty good clip!
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