im confused on which volume to use when tring to calculate density in the table below

D - Determination of the density of unknown metals 19. Collect two unknown metal cylinders and record any visual observations in your notebook. 20. Select one of the unknown metal cylinders and record its mass using the analytical balance. 21. Add approximately 4mL of DI H2O to a clean and dry 10mL graduated cylinder. Record the exact value of DI H2O in the graduated cylinder to one decimal place in your notebook. 22. Carefully tilt the graduated cylinder to the side and gently slide in a metal cylinder. Take care not to spill any DI H2O. If DI H2O does spill, reset the graduated cylinder and take a new initial volume measurement. 23. With the metal cylinder at the bottom of the graduated cylinder, record the exact volume of in your notebook. 24. Carefully pour out the DI H2O from the graduated cylinder, slide out the metal cylinder and pat it dry. 25. Repeat steps 20-24 two more times with the same metal cylinder for a total of three trials. 26. Repeat the steps above using the second metal cylinder for a total of three trials with each metal