1. A and B together can do a piece of work in 12 days, which B and C together can do in 16 days. After A has been working at it for 5 days and B for 7 days, C finishes it in 13 days. In how many days C alone will do the work?
(a) 16
(b) 24
(c) 37
(d) 48

2. A and B can do a piece of work in 45 days and 40 days respectively. They began to do the work together but A leaves after some days and then B completed the remaining work in 23 days. The number of days after which A left the work was:
(a) 11
(b) 7
(c) 9
(d) 12

3. A, B and C can complete a work separately in 24, 36 and 48 days respectively. They started together but C left after 4 days of start and A left 3 days before the completion of the work. In how many days will the work be completed?
(a) 15 days
(b) 24 days
(c) 25 days
(d) 38 days

4. A, B and C together earn `300 per day, while A and C together earn `188 and B and C together earn Rs.152. The daily earning of C is:
(a) Rs.40
(b) Rs.70
(c) Rs.112
(d) Rs.160

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