An irregular object was dropped into water in a graduated cylinder as shown in the figure below. Find the volume of an irregular object.

70 mL

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40 mL

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10 mL

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30 mL

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Solution

The correct option is C 10 mL
Displacement method is used to find the volume of an irregular object. In this method, an object is immersed in the water contained in a graduated cylinder and rise in volume of the water is noted. Rise in volume of the water is the volume of the object. Initially the water was at 30 mL. Finally the reading of water is at 40 mL. Hence, the volume of the stone is 40 mL – 30 mL = 10 mL.

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