Levin drank 2/5 of 1500 ml in the morning, so 900 ml remains. He drank 7/12 of that remainder in the afternoon.<br><br>[[model:questions/solutions/q4334.png]]<br><br>• Morning → 2/5 × 1500 = 600 ml<br>• Remainder → 1500 − 600 = 900 ml<br>• Afternoon → 7/12 × 900 = 525 ml<br><br>Levin drank 525 ml of water in the afternoon.<br>Check: Morning 600 + Afternoon 525 = 1125 ml drunk. Left = 1500 − 1125 = 375 ml = 5/12 × 900. ✓