A can do 7/8 of work in 28 days, B can do 5/6 of the same work in 20 days. The number of days they will take to complete if they do it together is

A can do 7/8 of work in 28 days, B can do 5/6 of the same work in 20 d

1.	A can do 7/8 of work in 28 days, B can do 5/6 of the same work in 20 days. The number of days they will take to complete if they do it together is
A.	<table><tr><td rowspan="2">15</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td><td rowspan="2">days </td></tr><td align="center">7</td></table>
B.	<table><tr><td rowspan="2">17</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td><td rowspan="2">days </td></tr><td align="center">5</td></table>
C.	<table><tr><td rowspan="2">14</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>5</center></td><td rowspan="2">days </td></tr><td align="center">7</td></table>
D.	<table><tr><td rowspan="2">13</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>5</center></td><td rowspan="2">days </td></tr><td align="center">7</td></table>
Answer» E.

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A can do 7/8 of work in 28 days, B can do 5/6 of the same work in 20 days. The number of days they will take to complete if they do it together is

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