1、 Cut a cylinder block into the largest cone. The volume of the cut part is () of the volume of the cone 2、 The volume of cylinder with bottom diameter of 20 cm and height of 30 cm (), the volume of cone with bottom diameter of 20 cm and height of 30 cm (), the volume of cylinder with bottom circumference of 12.56 cm and height of 3 cm (), the volume of cone with bottom circumference of 12.56 cm and height of 3 cm ()

1. The elimination part is two-thirds of a cylinder and one-third of a cone. Two thirds divided by one-third equals two
So it's twice as much
2. The square of the radius of 10 cm is multiplied by 3.14, and the height of 30 cm is 942 cubic cm
The perimeter of the bottom is 12.56 cm, and the radius is 2 cm
The square of radius 2cm is multiplied by 3.14, and the height 3cm is multiplied by 37.68cm3

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