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A and B working together, can do a piece of work in $4\frac{1}{2}$ hours, B and C working together can do it in 3 hours, C and A working together can do it in $2\frac{1}{4}$ hours. All of them begin the work at the same time. find how much time they will take to finish the piece of work.

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A and B working together, can do a piece of work in $4\frac{1}{2}$ hours, B and C working together can do it in 3 hours, C and A working together can do it in $2\frac{1}{4}$ hours. All of them begin the work at the same time. find how much time they will take to finish the piece of work.
1). 3 hours
2). 2 hours
3). 2.5 hours
4). 3.25 hours


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Answered by on | Votes 2 |
right answer is 2 hours

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