 
<translate> P da Q na iya kammala aiki a cikin kwanaki 20 da kwanaki 12 bi da bi. P kadai ya fara aikin kuma Q ya shiga tare da shi bayan kwanaki 4 har zuwa kammala aikin. Yaya tsawon aikin? Zaɓuɓɓuka: (A) Kwana biyar (B) Kwana 9 (C) Kwanaki 30 (D) Kwana 20 (E) Kwana 10 Ka yi tunani kafin ka yanke shawara. Wasu tunani bazuwar: <eng> P and Q can complete a work in 20 days and 12 days respectively. P alone started the work and Q joined him after 4 days till the completion of the work. How long did the work last?
Options:
(A) 5 days
(B) 9 days
(C) 30 days
(D) 20 days
(E) 10 days Think first, then make a decision. Some random thoughts: 