Answer:
It take 6 minutes 24 seconds to complete 4 laps
Explanation:
Speed=distance /time
To get time
Time=distance/ speed
In this case, distance is 4 laps of 400 meters, so we have to multiple 4 x 400=1600 meters
Speed= 250 per minute
Time=distance/ speed
Time=1600 meters /250 meter per minute =6,40 minutes is the same 6 minutes 24 seconds