The information's given in the question are very important and so should be paid attention to. based on those given information's the answer to the question can be easily deduced.
Amount of water that Kelvin drinks during a track meet = 0.6 liters
Then
Amount of water that Melinda drinks during the track meet = (0.6) * (0.8) liters
= 0.48 liters
So Melinda drinks 0.48 liters of water during the track meet. I hope the procedure is not difficult for you to understand. You can always use this procedure in future for solving similar problems without requiring any help from outside.
