(1)设长x,宽y。2(x+y)=28 x/州慧轿y=4/册肆3x=8cm y=6cm(2)长=8cm*1000=80m 宽=6cm*1000=60m(3)最大时花坛碧宏直径为长方形宽等于60m. V=(60/2)²π*0.3 =270π m³
长是8厘米,宽是6厘米?