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A does 7/10 part of work in 15 days. After that he completes the remaining work in 4 days with the help of B. In how many days will A and B together do the same work ?
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10 1 days 3 -
12 2 days 3 -
13 1 days 3 -
8 1 days 4
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Correct Option: C
Using basics of Rule 2,
Remaining work
| = 1 - | = | |||
| 10 | 10 |
| ∵ (A + B) take 4 days to do | work | 10 |
∴ (A + B) will do the work in
| 4 × | days | 3 |
| = | = 13 | days | ||
| 3 | 3 |
