The total surface area of a cylinder is 165πcm2. if the radius of its base is 5cm, then its height is ____________.
21.3 cm
16.4 cm
15.5 cm
11.5 cm
The ratio between the radius of the base and the height of a cylinder is 2:3. If its 1617cm3then its total surface area is
(a) 308 cm2 (b) 462 cm2 (c) 540 cm2 (d) 770 cm2