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If 10 persons can do a job in 20 days, then 20 person wid twice the efficiency can do the same job in : (a) 5 days. (b) 40 days (c) 10 days (d) 20 days

A group of workers can complete a job in 120 days. If there were 4 more such workers then the work could be finished in 12 days less. What was the actual strength of workers? (a) 30 workers (b) 40 workers (c) 42 workers (d) 36 workers

2 men or 5 women or 7 boys can finish a work in 469 days, then the number of days taken by 7 men, 5 women and 2 boys to finish the work is : (a) 134 (b) 106 (c) 100 (d) 98

6 children and 2 men complete a certain piece of work in 6 days. Each child takes twice the time taken by a man to finish the work. In how many days will 5 men finish the same work? (a) 6 (b) 8 (c) 9 (d) 15

314 weavers weaves 6594 shawls in \(\frac{1}{6}\) hours. What is the number of shawls weaved per hour by an average weaver? (a) 42 (b) 21 (c) 102 (d) 126

30 girls can finish a work in 40 days. Aftert how many days should 10 girls leave the work so that it may be finished in 46 days, if all the 30 girls started the work? (a) 18 days (b) 28 days (c) 22 days (d) 30 days

450 man-days of work can be completed by a certain number of men in some days. If the number of people (men) are increased by 27 , then the number of day required to complete the same work is decreased by 15. The number of days are required to complete the three times work (than the previous/actual work) by 27 men? (a) 50 (b) 60 (c) 54 (d) 45

A contractor undertook to complete the work in 40 days and he deployed 20 men for his work. 8 days before the scheduled time he realised that \(\frac{1}{3}\) rd of the work was still to be done. How many more men were required to complete the work in stipulated time? (a) 16 (b) 15 (c) 20 (d) 25

7 Indian and 4 Chinese finish a job in 5 days. 7 Japanese and 3 Chinese finish the same job in 7 days. Given that the efficiency of each person of a particular nationality is same but different from others. One Indian, one Chinese and one Japanese will complete the work in : (a) \(18 \frac{3}{13}\) days (b) \(20 \frac{5}{12}\) days (c) \(21 \frac{6}{14}\) days (d) \(20 \frac{7}{12}\) days

\(A, B\) and \(C\) are three book binders. \(A\) takes 8 minutes, \(B\) takes 12 minutes and \(C\) takes 16 minutes to bind a book. If they work each day for 12 hours, thèn on an average, how many books each one bind per day? (a) 65 (b) 52 (c) 48 (d) 70