 
 <translate> A aikin kwana daya ne = 1/30 B aikin kwana ɗaya = 1/45 (A + B) aiki ne na kwana daya = 1/30 + 1/45 = 1/18 Sashin aikin da aka kammala a cikin kwanaki 7 = 7 (1/18) = 7/18. Amsar ƙarshe: (B). <yor> A jẹ́ iṣẹ́ ọjọ́ kan = 1/30 B jẹ́ iṣẹ́ ọjọ́ kan = 1/45 (A + B) jẹ iṣẹ́ ọjọ́ kan = 1/30 + 1/45 = 1/18 Apá iṣẹ́ tí a parí ní ọjọ́ méje = 7 (1/18) = 7/18. Ìdáhùn tó péye: (B). 