he find that the water was risen where he stared to put the person in.
Archimedes discovered volume displacement when he was in the bath tub because the weight of an object makes the water rise.But the volume of the water was constant.He then ran outside on the streets screaming,EUREKA!...naked
He filled a bath half way with water then when he went in he found out that the water moved up, he wondered how that happened. So he started to study further into it....
1805
Archimedes
It was the 'eureka' moment. Apparently - he was running a bath, and the water filled it right to the top. He got in without thinking, and noticed the water spilling over the edge. Getting out - he calculated that the amount of water lost was the same as his own volume.
215bc
He discovered that you have to find the volume, mass, and density of something
How? With his brain! That's how he answered it
He discovered the method to calculate the volume of a irregular object (rock).
Archimedes
Archimedes discovered the law of hydrostatic displacement. Supposedly, in trying to determine how to find the density of the ruler's crown, he was perplexed by the problem. He decided one night to take a bath and, while sitting down in the bath water, he noticed that the water level went up. From this, he realized that the amount of water displaced was equal to the volume of his body immersed in the water. From mass and volume, density can be determined, and he could differentiate between different metals due to densities.
Archimedes took a bowl full of water of known volume and then dipped the irregular shape body. Amount of water fall down is measured and is the volume of that body.