1.A does a work in 10 days and B does the same work in 15 days. In how many days they together will do the same work?
 A. 5 days
 B. 6 days
 C. 8 days
 D. 9 days
 
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2.A man can do a piece of work in 10 days but with the assistance of his son, the work is done in 8 days. In how many days, his son alone can do the same piece of work?
 A. 15 days
 B. 22 days
 C. 30 days
 D. 40 days
 
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3.A can finish a work in 18 days and B can do the same work in half the time taken by A. Then, working together, what part of the same work they can finish in a day?
 A. \frac{1}{6}
 B. \frac{1}{9}
 C. \frac{2}{5}
 D. \frac{2}{7}
 
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4.George takes 8 hours to copy a 50 page manuscript while Sonia can copy the same manuscript in 6 hours. How many hours would it take them to copy a 100 page manuscript, if they work together ?
 A. 6\frac{6}{7}
 B. 9
 C. 9\frac{5}{7}
 D. 14
 
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5.A can do a piece of work in 25 days and B in 20 days. They work together for 5 days and then A goes away. In how many days will B finish the remaining work ?
 A. 17 days
 B. 11 days
 C. 10 days
 D. None of these
 
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6.A man is twice as fast as a woman. Together the man and the woman do the piece of work in 8 days. In how many days each will do the work if engaged alone?
 A. man-14 days, woman-28 days
 B. man-12 days, woman-24 days
 C. man-10 days, woman-20 days
 D. None of these
 
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7.A and B can do a job in 16 days and 12 days respectively. 4 days before finishing the job, A joins B. B has started the work alone. Find how many days B has worked alone?
 A. 6 days
 B. 4 days
 C. 5 days
 D. 7 days
 
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8.A contractor undertakes to built a walls in 50 days. He employs 50 peoples for the same. However after 25 days he finds that only 40% of the work is complete. How many more man need to be employed to complete the work in time?
 A. 25
 B. 20
 C. 35
 D. 30
 
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