Question

锥台体积公式

Answer 1

V=1/3*pai*(R^2+Rr+r^2)*hS1=pai*r1^2S2=pai*r2^2H1-H2=hR/(H2+h)=r/H2H2=rh/(R-r)H1=H2+h=Rh/(R-r)V=1/3*pai*R^2*H1-1/3*pai*r^2*H2=1/3*pai*R^2*Rh/(R-r)-1/3*pai*r^2*rh/(R-r)=1/3*pai*h*(R^3-r^3)/(R-r)=1/3*pai...