5km in 20 min as a rate
Distance = 5 km
1km = 1000metres
5 km = ?
5(1000) = 5000metres
Time = 20 minutes
1minute = 60seconds
20minutes = ?
20(60) =1200secomds
Speed = D/T
Therefore = ( 5000/1200) m/s
= 50/12 m/s= 4.2 m/s