Henry Ernest Dudeney/Puzzles and Curious Problems/138 - The Three Workmen

by : $138$

 * The Three Workmen
 * "Me and Bill," said Casey, "can do the job for you in ten days,
 * but give me Alec instead of Bill, and we can get it done in nine days.
 * "I can do better than that," said Alec. "Let me take Bill as a partner, and we will do the job for you in eight days."
 * Then how long would each man take over the job alone?