Can someone please explain how to solve this question?

Acylinder has volume 45π and radius 3. what is it’s height?

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Yahir designs bracelets. he uses between 9 and 15 red and yellow beads in the ratio of 2 red bead to 5 yellow beads. drag the beads into the container to meet these requirements