4 ÷ 2 = 2 cm

The volume of the cone is

2× 2× 3.14× 9× 31= 37.68 (cubic centimeter)

The radius of the bottom of the cylinder is

25. 12 ÷ 3. 14 ÷ 2 = 4 (cm)

The bottom area of the cylinder is

4× 4× 3. 14 = 50.24 (square centimeter)

The water level has dropped.

37.68/50.24 = 0.75 cm