[1]V=1/3πR2*H=1/3*3.14*(4/2)*(4/2)*8=33.49dm3
[2]V=1/3πR2*H=1/3*3.14*3*3*4=37.68 dm3
[3]L=2πR=12.56m,R=2m,V=1/3πR2*H= 12.56m3
[4]V=1/3S*H=1/3*7.5*1.8=4.5cm3
[5]L=2πR=25.12m,R=4m,V=1/3πR2*H= 50.24m2,小麦种植:750*50.24=37680kg
[6]V=1/3πR2*H=1/3*3.14*(4/2)*(4/2)*1.5=6.28m3,6.28/1.3=4.83,因此需要运5次