Time taken by A and B to complete a work is in the ratio 2 : 3. A alone worked for 5 days and left the work then B alone worked for 10 days on the same work, It is found than 70% of the work is completed. Find the time in which they together can complete the work.

Time taken by A and B to complete a work is in the ratio 2 : 3. A alone worked for 5 days and left the work then B alone worked for 10 days on the same work, It is found than 70% of the work is completed. Find the time in which they together can complete the work.
1). 10 days
2). 15 days
3). 8 days
4). 200/13 days

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