Please answer correctly

Which number produces a rationale number when multiplied by 1/5

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. consider the given table.

Acone is placed inside a cylinder. the cone has half the radius of the cylinder, but the height of each figure is the same. the cone is tilted at an angle so its peak touches the edge of the cylinder’s base. what is the volume of the space remaining in the cylinder after the cone is placed inside it?