Chem
posted by dra .
mass of empty cylinder is 87.470g
97.470g w/10mL of water
107.470g + 10mL of water
117.470g + 10 more mL of water
need to know the total volume of water (in mL or cm3)
total mass of water
density of water
calculate the average of the 3 densities of water.

Isn't the total volume 10 mL from the first sample, 10 more from the second sample, and 10 more for the third sample, for a total of 30 mL?
Isn't the total mass the final weighing of 117.470the initial weighing of 87.470?
density = mass/volume?
You can calculate individual volumes, masses, and densities from the values for mass and volume of each sample.