science
posted by Quetta .
a runner training for a race times her 400 meter laps around a track. her times are lap 1 60 seconds, lap 2 57 seconds, lap 3 55 seconds and lap 4 53 seconds. what is her avaerage velocity in meters per second (m/s)?

Divide 1600 meters (the total 4 lap distance run) by the total number of seconds.
The total time is 60 + 57 + 55 + 53 = ___ seconds
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