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the best and most accurate way would be to find a container that measures volume accurately (a graduated cylinder would work well) and fill it with a known amount of water(say, 10 mL). Then count out a number of rice grains (20 or 30 would be enough) and drop them into the the cylinder with the water. Tap the cylinder to make sure there are no bubbles attached to the rice grains, and then record the total volume or the rice and the water (or where the water is up to on the cylinder). If you subtract the volume of the water (the first measurement) from the volume of the rice+water (the second measurment) you will get the volume of the rice. Divide by the number of grains, and you'll have the average volume of a grain of rice.

if you want to find the volume of a particular grain of rice, then you can do the same process with just one grain of rice, but you will need something that measures volume much more accurately than a graduated cylinder

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15y ago
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Q: How do you work out the volume of a grain of rice?
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