李师傅将一个底面半径为4cm高6cm的圆柱形钢材熔铸成一个和原来底面相当的圆锥形零件零件高为?

1个回答

  • S底=πr²

    =3.14×4×4

    =12.56×4

    =50.24cm²

    v圆柱=sh

    =50.24×6

    =301.44cm³

    ∵v圆锥=sh1/3

    ∴301.44÷50.24×1/3=2cm

    答:圆锥形零件高为2cm.