The three-liter jar is filled with shot. Think of a way to determine the volume of a piece of lead used to make a shot.

To determine the volume of the shot, pour water into the jar to the very edges.
Water will fill all the gaps between the pellets. The total volume of the can (shot + water) will be 3 liters.
Then pour the water into a measuring container and determine the amount.
To calculate the total volume of all pellets, subtract the volume of water from the volume of the can.
As a result, we get the volume of lead, which was used to make shot.

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