解ï¼è§ä¸å¾ï¼ç§¯ååºé´ä¸ºé»ç»¿è²é¨åçé¢ç§¯ç»yè½´æ转æå¾æ转ä½çä½ç§¯Vï¼
V=2Ïâ«(0,3â10)x*(y1-y2)dx+2Ïâ«(3â10,10)x*(y-y2)dx
=2Ïâ«(0,3â10)xdx+2Ïâ«(3â10,10)x(10-x^2/10)dx
=Ïx^2](0,3â10)+2Ï*[5x^2-(1/40)x^4](3â10,10)
=90Ï+2Ï[5(100-90)-(1/40)(100-90)*(100+90)]
=90Ï+2Ï(50-47.5)
=95Ïã