A can do a work in 12days. When he had worked for 3days, B joinedhim. If they complete the work in 3more days, in how manydays can Balone finish the work?
Choices:
A) 3 days B) 4 days C) 6 days D) 7 days E) 9 days
sax Work done by Afar 3 days : i   J   .. Remzming war — 1   .Work done by (A + B) for 1 day :   . Work done by a for 1 day   6 days   6 days
<result>C</result>
A can do a work in 12days. When he had worked for 3days, B joinedhim. If they complete the work in 3more days, in how manydays can Balone finish the work?