IGCSE EXTENDED MATHEMATICS (0580) TOPICAL ...
The cone in the diagram has radius xcm and height 2xcm. The volume of the cone is 500 cm3. Find the value of x. [The volume, V, of a cone with radius r and height h is V = 1 Two mathematically similar solids have volumes of 180 cm3 and 360 cm3. The surface area of the smaller solid is 180 cm2 Calculate the surface area of the larger solid.