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Two graduated cylinders, one filled with water to 20 millimeters and one containing a rock and water filled to 32 millimeters.

Use the image to determine the volume of the rock.

Initial volume:
mL

Final volume:
mL

Volume of rock:
cm3

1 answer

To find the volume of the rock, you can use the difference in water levels between the two graduated cylinders.

  1. Initial volume (water level without rock): 20 milliliters (mL)

  2. Final volume (water level with rock): 32 milliliters (mL)

Now, calculate the volume of the rock:

\[ \text{Volume of rock} = \text{Final volume} - \text{Initial volume} \] \[ \text{Volume of rock} = 32 , \text{mL} - 20 , \text{mL} = 12 , \text{mL} \]

Since 1 milliliter (mL) is equivalent to 1 cubic centimeter (cm³), the volume of the rock is:

\[ \text{Volume of rock} = 12 , \text{cm}^3 \]

So, the answers are:

  • Initial volume: 20 mL
  • Final volume: 32 mL
  • Volume of rock: 12 cm³