A is twice aa good a workman as B and together they finish a piece of work in 14 days. Tbe number of days taken by A alone to finish the work is

A is twice aa good a workman as B and together they finish a piece of work in 14 days. Tbe number of days taken by A alone to finish the work is
1). 11 days
2). 21 days
3). 28 days
4). 42 days

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