Quality of Water and Vapour at P=200kPa: 10.7%

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SUMMARY

The quality of water and vapor at a pressure of 200 kPa is determined to be 10.7%. This conclusion is based on the specific volumes obtained from the steam table, where vf is 0.001061 m³/kg and vg is 0.88578 m³/kg. The calculation involves understanding the relationship between the volume of liquid water and vapor in a vertical cylinder, which holds 1 cm of liquid and 100 cm of vapor. The answer is confirmed as option 2) 10.7% due to the proportions of liquid and vapor present.

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A vertical circular cylinder holds 1 cm of liquid water and 100 cm of vapour.
If P = 200 kPa, the quality is nearest to _____.
1)1.02%
2) 10.7%
3) 40.6%
4) 80.3%
Answer is 2). Why? i can't seems to work out the answer.
From Steam table, at P=200kPa, (Specfic volume) vf= 0.001061, vg= 0.88578
 
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