 
 <translate> Iṣẹ́ tí ẹ̀rọ ìfọntí ṣe ní ìṣẹ́jú kan = 1/15 - (1/20 + 1/24) = - 1/40 Ìwọ̀n ìdìpọ̀ 1/40 = 3 galoni\ Iye ti gbogbo = 3 * 40 = 120 gallons. Nítorí náà ìdáhùn tí ó kẹ́yìn ni (C). <hau> Aikin da bututun sharar ya yi a cikin minti 1 = 1/15 - (1/20 + 1/24) = - 1/40 Volume na 1/40 kashi = 3 galan\ Volume na dukan = 3 * 40 = 120 galan. Saboda haka amsar ita ce (C). 