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R is 80% more efficient than S. If S alone can make a book in 90 days, then R alone can make the book in how many days?1). 652). 603). 504). 70 |
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Answer» Let efficiency of S be 100 Thus, Efficiency of R = 100 × 180/100 = 180 Ratio of their efficiency R : S = 180 : 100 = 9 : 5 If S alone can make a book in 90 DAYS, So, Total work = 90 × 5 = 450 ∴ R alone can COMPLETE the book = 450/9 = 50 days |
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