1. A cylinder with a radius of 4cm is cut along the diameter of the bottom surface, and the surface area is increased by 40 square centimeters. What is the volume of the cylinder 2. A cone with a bottom radius of 3 decimeters is cut vertically along the height, and the surface area increases by 60 square decimeters. What is the volume of the cone

1. A cylinder with a radius of 4cm is cut along the diameter of the bottom surface, and the surface area is increased by 40 square centimeters. What is the volume of the cylinder 2. A cone with a bottom radius of 3 decimeters is cut vertically along the height, and the surface area increases by 60 square decimeters. What is the volume of the cone

1. Height: 40 ^ (4 × 2) = 5 (CM) volume: 4 & # 178; × 3.14 × 5 = 251.2 (CM & # 179;) increase is diameter × height, divide the increase by diameter is height. 2, height: 60 ^ (3 × 2) = 10 (DM) volume: 3 & # 178; × 3.14 × 10 ^ 3 = 94.2 (DM & # 179;) as above, increase