v柱=50*50*40=100000
v锥=1/3*50*50*25根2=62500根2 /3
V=V柱+V锥
V=100000+62500根2 /3
v=129462 mm^2
v=129.5 cm^2
m=密度*体积=129.5*8.9=1152.55 g
v柱=50*50*40=100000
v锥=1/3*50*50*25根2=62500根2 /3
V=V柱+V锥
V=100000+62500根2 /3
v=129462 mm^2
v=129.5 cm^2
m=密度*体积=129.5*8.9=1152.55 g