Henry Ernest Dudeney/Puzzles and Curious Problems/224 - The Tank Puzzle

by : $224$

 * The Tank Puzzle
 * The area of the floor of a tank is $6$ square feet,
 * the water in it is $9$ inches deep.
 * $(1)$ How much does the water rise if a $1$ foot metal cube is put in it,
 * $(2)$ How much farther does it rise if another cube like it is put in by its side?