Exams › IBPS PO › Quantitative Aptitude
The time taken by A alone to complete a work is 100% more than the time taken by A and B together to complete the same work. B is thrice as efficient as C. B and C together take 12 days to complete the work. How many days will A take to complete the work alone?
- 32 days
- 16 days
- 24 days
- 20 days
Correct answer: 16 days
Solution
B and C together finish the work in 12 days, so their combined rate is 1/12. Since B is thrice as efficient as C, B's rate is 3/4 of the combined rate and C's is 1/4. Then A and B together take half the time A alone takes, so A alone takes 16 days.
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