Mathematics  Time and Work  Set 1
Q.1. If 4 men working 4 hours a day for 4 days complete 4 units of work, then how many units of work will be completed by 2 men working 2 hours a day in 2 days?
(a) 2 units (b) 1 unit (c) 0.5 unit (d) 0.25 unit Q.2. The efficiency of P is twice that of Q, whereas the efficiency of P and Q together is three times that of R. If P, Q and R work together on a job, then in what ratio should they share their earnings? (a) 2:1:1 (b) 4:2:1 (c) 4:3:2 (d) 4:2:3 Q.3. If 5 men or 7 women can earn Rs. 5250 per day, how much would 7 men and 13 women earn per day? (a) Rs. 11600 (b) Rs. 11700 (c) Rs. 16100 (d) Rs. 17100 Q.4. A can do a piece of work in 25 days and B can do the same work in 30 days. They work together for 5 days and then A leaves. B will finish the remaining work in (a) 18 days (b) 19 days (c) 20 days (d) 21 days Q.5. If A, B and C earn Rs. 150 per day while A and C earn Rs. 94 per day and B and C earn Rs. 76 per day, then C's earning per day is (a) Rs. 56 (b) Rs. 75 (c) Rs. 20 (d) Rs. 34 Q.6. P can do a piece of work in 9 days. R is 50% more efficient than P. The number of days it takes for R to do the same piece of work is (a) 13.5 days (b) 6 days (c) 12 days (d) 4.5 days Q.7. A company has a job to prepare a certain number of cans and there are 3 machines A, B and C for this job. A can complete the job in 3 days, B can complete the job in 4 days and C can complete the job in 6 days. How many days the company will take to complete the job if all the machines are used simultaneously? (a) 4 days (b) 4/3 days (c) 3 days (d) 3/4 days Q.8. A is thrice as good workman as B and therefore, able to finish a job in 60 days less than B. Working together they will do it in (a) 20 days (b) 30 days (c) 25 days (d) 22.5 days Q.9. 20 workers working for 5 hours a day complete a piece of work in 10 days. If 25 workers are employed to work 10 hours a day, what is the time required to complete the work? (a) 4 days (b) 5 days (c) 6 days (d) 3 days Q.10. If 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same piece of work in 2 days, what is the time taken by 15 men and 20 boys in doing the same piece of work? (a) 4 days (b) 5 days (c) 6 days (d) 7 days Q.11. A and B can together finish a piece of work in 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 do the same piece of work?
(a) 40 (b) 50 (c) 54 (d) 60 Q.12. A and B can separately do a piece of work in 20 and 15 days respectively. They worked together for 6 days, after which B was replaced by C. If the remaining work was finished in next 4 days, then the number of days in which C alone can do the same piece of work will be: (a) 30 days (b) 35 days (c) 40 days (d) 60 days Q.13. If 12 men and 16 women can do piece of work in 5 days; 13 men and 24 women can do same piece of work in 4 days, then the ratio of the daily work done by a man to that of a woman is (a) 2 : 1 (b) 3 : 1 (c) 2 : 3 (d) 5 : 4 Q.14. X can do a job in 16 days. In how many days will the work be completed by Y, if the efficiency of Y is 60% more than that of X? (a) 10 days (b) 12 days (c) 25 days (d) 30 days Q.15. 2 men and 1 woman can complete a piece of work in 14 days, while 4 women and 2 men can complete the same piece of work in 8 days. If a man gets Rs. 90 per day, then how much should a woman get per day? (a) Rs. 48 (b) Rs. 60 (c) Rs. 72 (d) Rs. 135 Answers

