Time and Work
|
times as efficient as B. The same job can be done by A alone in :
| 9 | 1 | days |
| 3 |
B
11 days
C
| 12 | 1 | days |
| 4 |
D
| 16 | 1 | days |
| 3 |
ANS:B - 11 days
| (A's 1 day's work) : (B's 1 day's work) = | 7 | : 1 = 7 : 4. |
| 4 |
| Then, 7x + 4x = | 1 |  11x = |
1 | x = |
1 | . |
| 7 | 7 | 77 |
 A's 1 day's work = |
 |
1 | x 7 |  |
= | 1 | . |
| 77 | 11 |
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