 <translate> Q: The speed of a boat in still water is 50kmph and the speed of the current is 20kmph. Find the speed and upstream?
Options:
(A) 30 kmph
(B) 40 kmph
(C) 78 kmph
(D) 15 kmph
(E) 23 kmph Let's give some random thoughts before answering. <yor> Ìbéèrè: Ìyára ọkọ̀ ojú omi nínú omi tó rọ̀ jẹ́ 50kmph àti iyara ìgbì omi jẹ́ 20kmph. Ṣé o ti rí ibi tí wọ́n ti ń sáré? Àwọn àyè: (A) 30 kmph (B) 40 kmph (C) 78 kmph (D) 15 kmph (E) 23 kmph Ẹ jẹ́ ká sọ̀rọ̀ díẹ̀ ká tó dáhùn. 