 
 <translate> Some question: A can do a piece of work in 20 days. B in 15 days A and C in 12 days. In how many days can A finish the work if he is assisted by B on one day and C on the next, alternately?
Options:
(A) 2 days
(B) 8 days
(C) 6 days
(D) 8 days
(E) 9 days
Some stream of consciousness: <hau> Wasu tambaya: A iya yi wani yanki na aiki a 20 days. B a cikin kwanaki 15 A da C a cikin kwanaki 12. A cikin kwanaki nawa ne A zai gama aikin idan B ya taimake shi a rana ɗaya kuma C ya taimake shi a rana ta gaba, a bi da bi? Zaɓuɓɓuka: (A) Kwana biyu (B) Kwana takwas (C) Kwana shida (D) Kwana takwas (E) Kwana 9 Wani rafi na sani: 