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Smita can finish a work in 12 days and Sam can finish the same work in 9 days.After working together for 4 days they both leave the job. What is the fraction of unfinished work?1). 1/22). 7/93). 2/94). 1/4 |
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Answer» WORK DONE by Smita in one day = 1/12 Work done by Sam in one day = 1/9 Work done by Smita and Sam TOGETHER in one day = (1/12) + (1/9) = 7/36 Work done by Smita and Sam together in 4 days = 4 × 7/36 = 7/9 The fraction of unfinished work = 1 – 7/9 = 2/9 ∴ The fraction of unfinished work = 2/9 |
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