A tank is made in the shape of a rectangular prism, measuring 12 cm by 16 cm by 10 cm. It is full of water. A small rectangular prism measuring 2 cm by 3 cm by 4 cm is dropped into the full tank The amount of water which overflows will be:
it will be equal to the volume of the small prism, assuming it sinks completely.
I assume you know how to find the volume of such a prism.