- A can do a piece of work in 21 days and B in 28 days. Together they started the work and B left after 4 days. In how many days can A alone do the remaining work?
(A) 12
(B) 10
(C) 16
(D) 14
(E) None of these
(A) 12
(B) 10
(C) 16
(D) 14
(E) None of these