 
<translate> Bututu biyu A da B na iya cika tanki a cikin awanni 36 da awanni 45 bi da bi. Idan an bude bututun biyu a lokaci guda, tsawon wane lokaci ne za a dauka kafin a cika tankin? Zaɓuɓɓuka: (A) Awanni 20 (B) Awanni 22 (C) Awanni 23 (D) Awanni 24 (E) 21 hours Rafi na sani: <eng> Two pipes A and B can fill a tank in 36 hours and 45 hours respectively. If both the pipes are opened simultaneously, how much time will be taken to fill the tank?
Options:
(A) 20 hrs
(B) 22 hrs
(C) 23 hrs
(D) 24 hrs
(E) 21 hrs Stream of consciousness: 