Class VIII

A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B had to leave and A alone completed the remaining work. The whole work was completed in :
  1. 8 days
  2. 10 days
  3. 12 days
  4. 15 days
A, B and C can complete a piece of work in 24, 6 and 12 days respectively. Working together, they will complete the same work in:
  1. 1 day 24
  2. 7 day 24
  3. 3 3 days 7
  4. 4 days
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
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
Twenty women can do a work in sixteen days. Sixteen men can complete the same work in fifteen days. What is the ratio between the capacity of a man and a woman?
  1. 3 : 4
  2. 4 : 3
  3. 5 : 3
  4. Data inadequate
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