The figure shows Tap S, Tap T and an empty tank with a capacity of 55.3 litres. Water flows Tap S at 3.5 litres per minute and from Tap T at 2.9 litres per minute. Tap S was turned on first. Tap T was turned on 3 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 S?