How many cubic inch ice cubes can fit into a glass that has been inside diameter of 3 inches and was 5 inches tall

Answer 1

4 ice cubes packed tightly in a square would have a diagonal of 2(2)^.5 = 2.828 and would fit in a 3 in diameter glass. You could have 5 such rows of ice cubes in a 5 inch tall glass for a total of 20 ice cubes.