An air stream with an absolute humidity of 0.011 kg of water per kg of dry air is dried to a humidity of 0.002 kg of water per kg of dry air in an absorption tower packed with 2-inch Raschig rings. A 50% by weight sodium hydroxide (NaOH) solution is used. The equilibrium data for this system are presented in the following table:

X	Y
Mole of H2O / Mole of NAOH	Mole of H2O / Mole of dry air
0	0
1	4
2	11
3	28
4	67
5	100
6	126
7	142
8	157
9	170
10	177
12	190
16	202

If the flow of the absorbent solution is 25% larger than the minimum and the height of one transfer unit is 60 cm, calculate the height of the tower in order to carry out this operation.