Time and Work Set 12

Time And work – Set 12

Time and work related questions are very important for competitive exams with usually 2-3 questions coming from this section. We will be coming up with over 20 sets on time and work set problems for your practice.

Q1. A can do a piece of work in 18 days and B in 12 days. They began the work together, but B left the work 3 days before its completion. In how many days, in all, was the work completed?
(a) 12 days
(b) 10 days
(c) 9.6 days
(d) 9 days

Q2. If A and B together can complete a work in 18 days, A and C together in 12 days and B and C together in 9 days, then B alone can do the work in?
(a) 18 days
(b) 24 days
(c) 30 days
(d) 40 days

Q3. 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) 10½ day

Q4. A and B can do a work in 45 days and 40 days respectively. They began the work together but A left after some time and B completed the remaining work in 23 days. After how many days of the start of the work did A leave?
(a) 10 days
(b) 9 days
(c) 8 days
(d) 5 days

Q5. A can do a piece of work in 12 days and B in 15 days. They work together for 5 days and then B left. The days taken by A to finish the remaining work is?
(a) 3
(b) 5
(c) 10
(d) 21

SOLUTIONS:

1.D
2.B
3.C
4.B
5.A