Exercise :: Time and Work  General Questions
11.  A can finish a work in 18 days and B can do the same work in 15 days. B worked for 10 days and left the job. In how many days, A alone can finish the remaining work? 

Answer: Option C Explanation:

12.  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? 

Answer: Option B Explanation: Let 1 man's 1 day's work = x and 1 woman's 1 day's work = y.
Hence, 10 women will complete the work in 40 days. 
13.  A and B can together finish a work 30 days. They worked together for 20 days and then B left. After another 20 days, A finished the remaining work. In how many days A alone can finish the work? 

Answer: Option D Explanation:
Therefore, the whole work will be done by A in (20 x 3) = 60 days. 
14.  P can complete a work in 12 days working 8 hours a day. Q can complete the same work in 8 days working 10 hours a day. If both P and Q work together, working 8 hours a day, in how many days can they complete the work? 

Answer: Option A Explanation: P can complete the work in (12 x 8) hrs. = 96 hrs. Q can complete the work in (8 x 10) hrs. = 80 hrs.

15.  10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work? 

Answer: Option C Explanation:
5 women and 10 children will complete the work in 7 days. 