
Example: The radius of a hemisphere is 7 cm. Find its surface area. Solution: Surface area of hemisphere = 2 * pi * r^{2} Given that, radius (r) = 7 cm. = 2 * 22/7 * 7 * 7 = 308 Sq. cm. Directions: Solve the following problems. Also write at least 5 examples of your own. 