A cylindrical cylinder full of water with a diameter of 20cm at the bottom. Five rigid cones with a circumference of 25.12cm and a height of 12cm on the ground were taken out from the cylinder. How much did the water surface drop Formula, result,

A cylindrical cylinder full of water with a diameter of 20cm at the bottom. Five rigid cones with a circumference of 25.12cm and a height of 12cm on the ground were taken out from the cylinder. How much did the water surface drop Formula, result,

Volume of water falling part = volume of 5 steel cones
Falling height of water surface = volume of falling part of water △ bottom area of cylinder
Bottom radius of steel cone: 25.12 △ 3.14 △ 2 = 4cm
The bottom area of steel cone: 3.14 × 4 & sup2; = 50.24 square centimeter
Volume of a steel cone: 1 / 3 × 50.24 × 12 = 200.96 cubic centimeter
Volume of 5 steel cones: 200.96 × 5 = 1004.8 cubic centimeter
The bottom area of the cylinder: 3.14 × (20 △ 2) & sup2; = 314 square centimeters
Falling height of water surface: 1004.8 △ 314 = 3.2cm