# Math

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A rock is placed into a graduated cylinder containing 80 mL of water. What is the volume of the rock if the water level rises to the 120 mL level?

• Math -

You're kidding.
120 ml - 80 ml = 40 ml
Volume of the rock is 40 ml....

• Math -

Well, where did the difference between the final volume and the initial volume come from? Did the water expand,or did something move the water up?

• Math -

40

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