Masha bought red, green, and yellow balloons for a party. She bought 40 red 3
balloons. The number of green balloons Masha bought is
of the number of red
5
2
balloons. The number of green balloons is also
of the number of yellow
3
balloons.
How many balloons did Masha buy for the party?

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?