A right circular cylinder has height as 18 cm and radius as 7 cm. The cylinder is cut in three equal parts (by 2 cuts parallel to base). What is the percentage increase in total surface area?
A prism has a regular hexagonal base with side 6 cm. If the total surface area of prism is 216 cm2 , then what is the height (in cm.) of prism?
The radius of base of solid cone is 9 cm and its height is 21 cm . it cut into 3 parts by two cuts, which parallel to its base. The cuts are at height of 7cm. and 14 cm.from the base respectively.What is the ratio of curved surface area of top, middle and bottom parts respectively?