circumference of a circle is 110cm. If the diameter of this circle is used to make one side of a square, what is the perimeter of the square?​

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

I’m stuck on this equation, anyone got the answer?

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?