A can do a certain work in 12 days. B is 60% more efficient then A. How many days will B and A together take to do the same job?
\(\frac{{80}}{{13}}{ \text{days}}\)
\(\frac{{70}}{{13}}{ \text{days}}\)
\(\frac{{75}}{{13}}{ \text{days}}\)
\(\frac{{60}}{{13}}{ \text{days}}\)
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