Class VIII

A alone can do a piece of work in 6 days and B alone in 8 days. A and B undertook to do it for Rs. 3200. With the help of C, they completed the work in 3 days. How much is to be paid to C?
  1. RS.375
  2. Rs. 400
  3. Rs. 600
  4. Rs. 800
A and B can do a job together in 7 days. A is 1 times as efficient as B. The same job can be done by A alone in
  1. 9 1 days 3
  2. 11 days
  3. 12 1 days 4
  4. 16 1 days 3
4 men and 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it?
  1. 35
  2. 40
  3. 54
  4. 80
A machine P can print one lakh books in 8 hours, machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 A.M. while machine P is closed at 11 A.M. and the remaining two machines complete work. Approximately at what time will the work (to print one lakh books) be finished ?
  1. 11:30 A.M.
  2. 12 noon
  3. 12:30 P.M.
  4. 1:00 P.M.
A and B can do a work in 8 days, B and C can do the same work in 12 days. A, B and C together can finish it in 6 days. A and C together will do it in :
  1. 4 days
  2. 6 days
  3. 8 days
  4. 12 days
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