Math and Arithmetic

Physics

Length and Distance

# What is the average speed if you walk for 120 seconds at 1ms then run for 120 seconds at 6ms?

## Answer

###### Wiki User

###### 08/07/2008

To find the average speed you must know the total distance traveled and the total elapsed. The distance traveled in each interval is simply the speed multiplied by the time (v x t). Thus, in the first interval you travel 120 x 1 = 120 meters, in the second interval 120 x 6 = 720 meters; therefore, the total distance traveled is 840 meters. The total time elapsed is 120 + 120 = 240 seconds. An average speed is simply the total distance traveled divided by the total time elapsed thus in this case it is 720 m / 240 s = 3 m/s.

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