SOLUTION: S and T can finish a work in 50 days. They
worked together for 20 days and then left.
How much of the work is left?
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-> SOLUTION: S and T can finish a work in 50 days. They
worked together for 20 days and then left.
How much of the work is left?
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...., can finish a work in 50 days. They
worked together for 20 days and then left.
How much of the work is left?
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