Question : A can finish a job in 8 hours and B can finish the same job in 12 hours independently. If they work simultaneously, how many hours can they do the same job?

Question : $x$ can copy 80 pages in 20 hours $x$ and $y$ together can copy 135 pages in 27 hours. Then $y$ can copy 20 pages in:

Question : Richa, Rita and Reena can independently complete a task in 8 hours, 12 hours and 24 hours, respectively. If they work together, how much time will they take to complete that task?

Question : In a 1500 m race, X beats Y by 100 m and X beats Z by 240 m. By what distance does Y beat Z in the same race?

Question : Two workers A and B are engaged to do a piece of work. Working alone A would take 8 hours more to complete the work than when working together. If B worked alone, would take $4\frac{1}{2}$ hours more than when working together. The time required to finish the work