Out of a group of swans, 7/2 times the square root of swans are playing on the shore of the tank. Remaining two are quarrelling in the water. Calculate the total number of swans. ​

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?