The figure shows Tap D, Tap E and an empty tank with a capacity of 50.8 litres. Water flows Tap D at 3.8 litres per minute and from Tap E at 1.6 litres per minute. Tap D was turned on first. Tap E was turned on 2 minutes later. The taps were turned off at the same time when the tank was completely filled without overflowing. How much water flowed from Tap D?