Question : 9 boys and 12 men can complete a work in 24 days. Each boy takes thrice the time taken by a man to complete the work. In how many days will 15 men complete the same work?
Option 1: 26 days
Option 2: 30 days
Option 3: 24 days
Option 4: 22 days
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Correct Answer: 24 days
Solution : (9 boys + 12 men) complete the work in 24 days. The ratio of time taken by a boy and time taken by a man = 3 : 1 i.e., 3 boys are equivalent to 1 man. $\therefore$ 9 boys are equivalent to 3 men. So, (3 men + 12 men) are equivalent to 15 men So, 15 men complete the work in 24 days. Hence, the correct answer is 24 days.
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Question : 24 women and 9 men can complete a certain piece of work in 18 days. Each woman takes twice the amount of time taken by a man to finish the work. In how many days can only 9 men finish the same work?
Option 1: 42
Option 2: 35
Option 3: 39
Option 4: 48
Question : A and B together complete a work in 20 days, B and C together complete the same work in 30 days, and C and A together complete the same work in 24 days. In how many days A, B, and C together can complete the same work?
Option 1: 8 days
Option 2: 16 days
Option 3: 12 days
Option 4: 15 days
Question : A can do a work alone in 60 days and B can do the same work alone in 33.33% less time taken by A. Find the time taken by B to complete the work alone.
Option 1: 30 days
Option 2: 17 days
Option 3: 22 days
Option 4: 40 days
Question : 5 men can complete a work in 12 days, and 6 women can complete the same work in 20 days. In how many days can 1 man and 1 woman together complete this work?
Option 1: 120 days
Option 2: 32 days
Option 3: 40 days
Option 4: 60 days
Question : X boys can do a work in 80 days. In how much time, 2X boys will do half of the same work?
Option 1: 16 days
Option 4: 20 days
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