A can do a certain work in 12 days. B is 60% more efficient than A. How many days will B and A together take to do the same job?

A can do a certain work in 12 days. B is 60% more efficient than A. Ho

1.	A can do a certain work in 12 days. B is 60% more efficient than A. How many days will B and A together take to do the same job?
A.	<table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>80</center></td><td rowspan="2">days </td></tr><td align="center">13</td></table>
B.	<table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>70</center></td><td rowspan="2">days </td></tr><td align="center">13</td></table>
C.
D.	<table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>75</center></td><td rowspan="2">days </td></tr><td align="center">13</td></table>
E.	<table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>60</center></td><td rowspan="2">days </td></tr><td align="center">13</td></table>
Answer» E. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>60</center></td><td rowspan="2">days </td></tr><td align="center">13</td></table>

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A can do a certain work in 12 days. B is 60% more efficient than A. How many days will B and A together take to do the same job?

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