Cylinder: r = 2m, H = 1.5m, calculate the surface area and volume

Cylinder: r = 2m, H = 1.5m, calculate the surface area and volume

S=2*2*3.14*1.5+2*3.14*2*2=43.96
V=3.14*2*2*1.5=18.84

The volume diameter of half cylinder is 1.2m

1.2÷2=0.6
0.6²x3.14x1.5÷2=8.478

A cylinder with a length of 2M and a bottom radius of 1m is divided into five sections along the cross section. How much is the surface area increased? What is the volume of each section?

The cylinder is divided into 5 sections along the cross section, and the number of increased cross sections is
(5-1) × 2 = 8
The surface area has increased
1 × 1 × 3.14 × 8 = 25.12 (M2)
Each segment is long
2 △ 5 = 0.4 (m)
What is the volume of each segment
1 × 1 × 3.14 × 0.4 = 1.256 (M3)