if someone walks 5km in 21 minutes and then 4 km in 39 minutes then whats his average speed
9 kilometers in 60 minutes
= 9 kilometers/ hour
9 km in 60 minutes = 9 kph
avg speed is total distance divided by total time:
(5+4)/(21+39) km/min = 9 km/hr
That's a pretty good clip!
To calculate average speed, you need to determine the total distance traveled and the total time taken.
In the given case, the person walks 5 km in 21 minutes and then 4 km in 39 minutes. To find the total distance, you need to add these two distances together: 5 km + 4 km = 9 km.
Next, you find the total time taken by adding the two given time intervals: 21 minutes + 39 minutes = 60 minutes.
Finally, divide the total distance by the total time to calculate the average speed: 9 km / 60 minutes = 0.15 km/minute.
Therefore, the average speed of the person is 0.15 km per minute.