An air stream having an enthalpy of 100 kJ/kgda, is flowing at 20 kgda/s. It is cooled by water at temperature $10^\circ C$ circulating in a cooling coil at a flow rate of 10.0 l/s. If the return temperature of water is $20^\circ C$, the enthalpy of the cooled air, in kJ/kgda, is ______.

(Specific heat of water: 4.18 $kJ/kg ^\circ C$; $kgda$: $kg$ of dry air).