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Ramesh and Rahman can do a work in 20 and 25 days respectively. After doing collectively for 10 days at the work, they leave the work due to illness and Suresh completes rest of the work in 3 days. How many days Suresh alone can take to complete the whole work ?
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- 32 days
- 28 days
- 29 days
- 30 days
Correct Option: D
| Ramesh’s 1 day’s work = | |
| 20 |
| Rahman’s 1 day’s work = | |
| 25 |
| ∴ (Ramesh + Rahman)’s 1 days’ work = | + | ||
| 20 | 25 |
| = | = | ||
| 100 | 100 |
| ∴ Their 10 day‘s work = 1 - | = | ||
| 10 | 10 |
| ∵ Suresh does | work in 3 | |
| 10 |
∴ Time taken by Suresh in doing 1 work = 3 × 10 = 30 days
