 
 <translate> Q: A and B together can complete a work in 12 days. A alone can complete it in 20 days. If B does the work only for half a day daily, then in how many days A and B together will complete the work?
Options:
(A) 11 days
(B) 77 days
(C) 15 days
(D) 18 days
(E) 19 days
A: (C) <ibo> Ajụjụ: A na B nwere ike ịrụcha ọrụ ahụ n'ụbọchị iri na abụọ. Naanị A pụrụ ịrụcha ya n'ime ụbọchị 20. Ọ bụrụ na B na-arụ ọrụ ahụ naanị ọkara ụbọchị kwa ụbọchị, ụbọchị ole ka A na B ga-arụcha ọrụ ahụ? Nhọrọ: (A) Ụbọchị 11 (B) Ụbọchị 77 (C) Ụbọchị 15 (D) Ụbọchị iri na asatọ (E) Ụbọchị iri na itoolu A: (C) 