所求面积=∫x²dx+∫(2-x)dx
=(x³/3)│+(2x-x²/2)│
=1/3+1/2
=5/6;
所求体积=∫πx^4dx+∫π(2-x)²dx
=π(x^5/5)│+π(4x-2x²+x³/3)│
=π/5+π/3
=8π/15.