| Question | A and B can finish a piece of work in 30 days, B and C can finish it in 15 days, C and A in 10 days. Time taken by them together to do this work is? | |
| Type | multiple_choice | |
| Option | 5 days | incorrect |
| Option | 2(1/2) days | incorrect |
| Option | 7(1/2) days | incorrect |
| Option | 10 days | correct |
Solution
