 
 <translate> Ọrụ nke ọkpọkọ mkpofu na 1 nkeji = 1/15 - (1/20 + 1/24) = - 1/40 Mpịakọta nke 1/40 akụkụ = 3 galọn\ Mpịakọta nke dum = 3 * 40 = 120 galọn. Azịza ya bụ: (C). <yor> 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. Ìdáhùn tó péye: (C). 