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Example: A cuboid metal of dimensions 22 cm. * 8 cm. * 7 cm. was melted and cast into a cylinder of height 8 cm. what is its radius? Solution: Given that, Volume of cuboid = 28 * 8 * 7 cu. cm. Volume of cylinder (pi * r^{2} * h) = 22 * 8 * 7 cu. cm. Therefore, 22/7 * r^{2} * 8 = 22 * 8 * 7 r^{2} = 7 * 7 r = 7 cm. Directions: Solve the following problems. Also write at least 5 examples of your own. 