Fill a cylindrical water bucket with an inner diameter of 30cm and a height of hcom with water and pour it into a cuboid water tank. If the water only accounts for one fourth of the volume of the water tank, the water tank will be empty The volume of the tank is () cubic centimeter. (inner diameter refers to the diameter of the bottom of the cylinder)

Fill a cylindrical water bucket with an inner diameter of 30cm and a height of hcom with water and pour it into a cuboid water tank. If the water only accounts for one fourth of the volume of the water tank, the water tank will be empty The volume of the tank is () cubic centimeter. (inner diameter refers to the diameter of the bottom of the cylinder)

Volume of water tank = 15x15x3.14xhx4 = 2826hc3

There is a cylindrical water bucket with an inner diameter of 20 cm and a height of 36 cm. After it is filled with water, the water is poured into a cylindrical water tank with an inner diameter of 24 cm
At this time, the water accounts for half of the volume of the water tank, and the height of the water tank is calculated

π20*20*36=π24*24*h/2
h=50

Fill a 4 cm diameter and 30 cm high cylindrical bucket with water and pour it into a cuboid water tank. If the water only accounts for two thirds of the volume of the water tank, the volume of the water tank will increase

4/2=2
2^2pai=4pai
4pai*30*(3/2)=180pai