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A is 20% more efficient than B. If B can do a piece of work in 30 days, then in how many days A can do the same work?1. 20 days2. 24 days3. 25 days4. 36 days |
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Answer» Correct Answer - Option 3 : 25 days Given: A = 20% more efficient than B B can do the work in 30 days Formula used: Total work = Efficiency × Time taken Calculation: Let efficiency of B be 100 units/day ⇒ Efficiency of A = 100 × (120/100) = 120 units/day Total work = 100 × 30 = 3000 units Time taken by A = 3000/120 = 25 days ∴ Time taken by A is 25 days |
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