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Sharman is 20 percent less efficient than Vivek. If Vivek can make a helmet alone in 20 days, then in how many days can Sharman alone make the same helmet?1. 23 days2. 25 days3. 30 days4. 27 days |
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Answer» Correct Answer - Option 2 : 25 days Given: Sharman is 20 percent less efficient than Vivek Vivek can make a helmet alone in 20 days Formula used: The efficiency of a person is the inverse of the time taken Calculation: According to the question, Per day efficiency of Vivek for making the helmet = 1/20 ⇒ Sharman's per day efficiency for making the helmet = (80/100) × (1/20) = 0.8 × (1/20) = 1/25 ∴ Sharman can make the helmet in 25 days. |
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