जॉइन Examsbookउत्तर : 3. "6 hrs"
A take twice as much time as B or thrice as much time to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in ?5
प्र: A take twice as much time as B or thrice as much time to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in ?
- 18 hrsfalse
- 212 hrsfalse
- 36 hrstrue
- 44 hrsfalse
- उत्तर देखें
- Workspace
उत्तर : 3. "6 hrs"
व्याख्या :
Answer: C) 6 hrs Explanation: Suppose A, B and C take x, x/2 and x/3 respectively to finish the work. Then, (1/x + 2/x + 3/x) = 1/2 => 6/x = 1/2 => x = 12 So, B takes 6 hours to finish the work.