A can do a piece of work in 12 days. He worked for 15 days and then B completed the remaining work in 10 days. Both of them together will finish it in.
Choose the correct choice:  A) 12 1/2 days  B) 12 1/9 days  C) 12 8/2 days  D) 17 1/2 days  E) 32 1/2 days
15/25 + 10/x = 1 =&gt; x = 25   1/25 + 1/25 = 2/25   25/2 = 12 1/2 days   12 1/2 daysnswer: 12 1/2 days
<result>A</result>
A can do a piece of work in 12 days. He worked for 15 days and then B completed the remaining work in 10 days. Both of them together will finish it in.