question_answer

Robert can finish the writing of the book in 8 days while James can finish the same work in 10 days. If they work together then how long they will take to finish the same work?

A)  \[10\,\,\frac{1}{2}\,\,days\]                   

B)  \[6\,\,\frac{2}{3}\,\,days\]

C)  \[\frac{4}{9}\,\,days\]               

D)  \[4\,\,\frac{4}{9}\,\,days\]

E)  None of these