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6)

Person A can complete an assignment in 50 days. Person B can complete the same assignment in 76 days. What part of assignment will they complete 1 day separately?

7)

10 writers can write 20 books in 12 days working for 12 hours a day. Then in how many days can 24 writers write 32 books working for 16 hours a day?

8)

Person X can do a piece of work in 10 days. Person Y can do the same work in 12 days. How long will they take to finish the workl, if they both work together?

9)

A alone can complete a work in 6 days. B alone can complete the same work in 12 days. How long will they take to finish the work, if they both work together?

**[Bank clerks 2009]**

10)

A and B can do a piece of work in 72 days. B and C can do the same work in 120 days. A and C can do it in 90 days. In what time can A alone do it?

**[SSC 2011]**

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