Respuesta :

Try this option:
1. For cylinder: V=πr²h, where π=3.1415; r=3; h=9.
V=3.1415*3*9≈84.823 cm³.
2. For the cone: V=1/3 *πr²h, where π=3.1415; r=3; h=9.
V=1/3* 3.1415*3*9≈28.274334≈28.3 cm³.