3) your answer is correct
Simplify I got 9 somehow....
Simplify I'm just stuck on how to deal with the numbers (-5 and -25)
Simplify I got 2
Total surface area of cylinder X is 25cm^2
Total surface area of cylinder Y is 225cm^2
Height of cylinder X is 5cm
Calculate height of cylinder Y
Volume of Cylinder X is 27cm^3
Calculate volume of Cylinder Y
Again... I have no idea for the method of this volume and height calculating.