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15 men can do a work in 330 days. But after 220 days 15 more people are recruited, then in how many more days the work will be completed?A. 80 daysB. 60 daysC. 55 daysD. 50 days1. D2. C3. B4. A |
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Answer» Correct Answer - Option 2 : C Given: M1 = 15, D1 = 330 days M2 = 15 + 15 = 30 Concept used: Total work = Number of men × Total number of days Calculation: Let x more days to complete the remaining work after 220 days. Total work = Number of men × Total number of days Total work = M1 × D1 Total work = 15 × 330 Total work = 4950 Work completed after 220 days = 15 × 220 Required work = 3300 Remaining work = Total work – Work completed after 220 days ⇒ Remaining work = 4950 – 3300 ⇒ Remaining work = 1650 Remaining work = M2 × x ⇒ 1650 = 30 × x ⇒ x = 55 ∴ 55 more days the work will be completed. |
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