Let the total number of students be x. Two-Thirds of the students plan to do some volunteering. Two-Thirds in fraction can be written as 2/3. So the portion of the students which plan to do some volunteering is:
From these students, 3/5 plan to volunteer at community center. So the students who plan to volunteer at community center will be:
This means, among x students, 2/5 of the students plan to volunteer at the community center this summer.
Volume of cylinder is directly proportional to Height(h) and square of radius of base (r) with π as Constant of proportionality. ... If the height of a cylinder is doubled then the volume will get doubled. But, if the radius of the cylinder is doubled then the volume will get quadrupled.