The new water level of the burette is 38 cm^3
Now we know that a liquid has a definite volume but does not have definite shape. A burette is one of the apparatus that we use to measure the volume of a liquid when working in the laboratory.
Usually, a burette is used when we are carrying out a titration. It can be used to measure the amount of fluid that is dropped into the flask that is being used to effectively carry out the titration.
Given the fact that each of the new drops of water had a volume of 0.15cm cubed. Twenty of then will have a volume of about 20 * 0.15cm^3 = 3cm^3
New water level of the burette = 35 cm^3 + 3cm^3 = 38 cm^3
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