Formation of stalactites in karst caves

The rainwater of exercise chapter 3.1.2.1 infiltrates in a karst area. There is enough time that an equilibrium regarding the predominant mineral phase and an elevated C02 partial pressure of 3 Vol% can be reached. 

In the underground, there is a karst cavern with an extension of 10 m length, 10 m width and 3 m height connected via a natural tunnel to the atmosphere. Approximately 100 liter of the infiltrated, calcareous water is dripping daily from the ceiling into the cavern, in which the C02 partial pressure is the same as in the atmosphere. Stalactites are forming (Fig. 41) - why and in which amount per year  

How many mm per year do the stalactites grow assuming that the density of calcite is 2.7 g/cm3 and that approximately 15 % of the cavern ceiling is covered with stalactites  

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