If the radius of a cylinder is doubled, then how many times will its volume increase? , 8 | Mensuration...

If the radius of a sphere becomes 3 times then how many times will its volume be?

If side of a square is doubled, how many times its area will be increased?

If the radius of a sphere is doubled, its volume becomes

If the radius of a cylinder is doubled and height is halved, the volume will be doubled.

If the radius of a cylinder is doubled and the height remains same, the volume will be (a) doubled (b) halved (c) same (d) four times