Q1. 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:
(a) 8 days
(b) 10 days
(c) 12 days
(d) 15 days
Q2. A can finish a work in 24 days, B in 9 days and C in 12 days. B and C start the work but are forced to leave after 3 days. The remaining work was done by A in:
(a) 5 days
(b) 6 days
(c) 10 days
(d) 10 1/2 days
Q3. 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 the work. Approximately at what time will the work be finished?
(a) 11:30 a.m.
(b) 12 noon
(c) 2 p.m.
(d) 1 p.m.
Q4. A and B can together finish a work in 30 days. Then 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 job? (a) 40
(b) 50
(c) 54
(d) 60
Q5. A does 4/5 of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?
(a) 23 days
(b) 37 days
(c) 37.5 days
(d) 40 days
Q6. A and B together can do a piece of work in 30 days. A having worked for 16 days, B finishes the remaining work alone in 44 days. In how many days shall B finish the whole work alone?
(a) 30 days
(b) 40 days
(c) 60 days
(d) 70 days
Q7. A can do a piece of work in 14 days which B can do in 21 days. They begin together but 3 days before the completion of the work, A leaves off. The total number of days to complete the work is:
Q8. Kim can do a work in 3 days while David can do the same work in 2 days. Both of them finish the work together and get Rs. 150. What is the share of Kim?
(a) Rs. 30
(b) Rs. 60
(c) Rs. 70
(d) Rs. 75
Q9. 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?
(a) Rs. 375
(b) Rs. 400
(c) Rs. 600
(d) Rs. 800
Q10. 12 men complete a work in 9 days. After they have worked for 6 days, 6 more men join them. How many days will they take to complete the remaining work?
(a) 2 days
(b) 3 days
(c) 4 days
(d) 5 days
Solutions
1.C
2.C
3.D
4.D
5.C
6.C
7.C
8.B
9.B
10.A