 <translate> Student: The speed of a boat in upstream is 60 kmph and the speed of the boat downstream is 80 kmph. Find the speed of the boat in still water and the speed of the stream?
Options:
(A) 70, 10 kmph
(B) 35, 27 kmph
(C) 50, 60 kmph
(D) 45, 55 kmph
(E) 45, 65 kmph.
Another student: Let's say, hmmm...
 <yor> Akẹ́kọ̀ọ́: Ìyára tí ọkọ̀ ojú omi kan ń yára ní òkè odò jẹ́ 60 kmph, tí ọkọ̀ ojú omi kan sì ń yára ní ìsàlẹ̀ odò jẹ́ 80 kmph. Ṣàwárí iyara ọkọ̀ ojú omi nínú omi tí kò rọ̀ àti iyara odò? Àwọn àyè: (A) 70, 10 kmph (B) 35, 27 kìlómítà ní wákàtí kan (C) 50, 60 kmph (D) 45, 55 kmph (E) 45, 65 kìlómítà ní wákàtí. Ọmọ iléèwé mìíràn: Ẹ jẹ́ ká sọ pé, hmmm... 