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15 men can finish a piece of work in 40 days. The number of days after which 5 men should leave the work so that the work is finished in 45 days altogether is1. 102. 203. 304. 35 |
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Answer» Correct Answer - Option 3 : 30 Given: 15 men can finish a piece of work in 40 days. Number of men to leave the work = 5 Calculations: Let the number of days after which 5 men left the work be y. 15 × 40 = 15y + (15 - 5) × (45 - y) ⇒ 600 = 15y + 10(45 - y) ⇒ 600 = 15y + 450 - 10y ⇒ 600 = 5y + 450 ⇒ 150 = 5y ⇒ y = 30 days ∴ After 30 days 5 men should leave the work. |
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