We have converted time in hours. Kilometre km and metre m is usually taken as the unit of distance. To work out what the units are for speed you need to know the units for distance and time.
Speed DistanceTime This tells us how slow or fast an object moves.
So if distance km and Time hr than as Speed Distance Time the unit of speed will km hr. Kilometre km and metre m is usually taken as the unit of distance. As distance is measured in meter and time is measured in seconds. In general the formula relating distance rate and time is distanceratetime distance rate time Distance Rate and Time For an object moving at a uniform constant rate the distance traveled the elapsed time and the rate are related by the formula.