A solid hemisphere has a radius of 7 cm. What is its total surface area in square cm? (Use π = 22/7.)

A SOLID hemisphere has a curved part 2π$r^2=2\times (22/7)\times 49=308$ sq cm plus the flat circular face π$r^2=154$ sq cm, so the total surface = 3π$r^2=462$ sq cm. The trap 308 is the curved surface alone, with the flat face forgotten — that value is the answer only for a hollow bowl's outside; 616 is 4π$r^2$, the surface of a whole sphere; 154 is only the flat face.