After the first use of 10g, the ratio of distilled water to glucose is10: (100-10) =1/9.

Then distilled water accounts for 10% of the total capacity.

After using 10g, the water capacity is10-10 *10 = 9g, and the glucose capacity is 90-10 * 9/10 =

So if 10g water is added, the ratio of distilled water to glucose is (9+10)/81=19/81.