 <translate> A's one day's work = 1/30
B's one day's work = 1/45
(A + B)'s one day's work = 1/30 + 1/45 = 1/18
The part of the work completed in 7 days = 7 (1/18) = 7/18.
The final answer: (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). 