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A can do a piece of work in 6 days. B is 25% more efficient than A. How long would B alone take to finish this work?
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4 4 days 5 -
3 1 days 3 -
5 1 days 4 -
2 2 days 3
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Correct Option: A
Ratio of A's and B's efficiency = 4 : 5
Ratio of time taken = 5 : 4
| ∴ Time taken by B = | 5 |
| = | = 4 | days | ||
| 5 | 5 |
Aliter : Using Rule 17,
Here, x = 6, R = 25%
Time taken by B
| = x × | days | 100 + R |
| = 6 × | 125 |
| = 6 × | 5 |
| = | = 4 | days | ||
| 5 | 5 |
