 
<translate> Tambaya: Wani mutum yana tuka jirgin ruwansa kilomita 90 zuwa ƙasa da kilomita 45 zuwa sama, yana ɗaukar awanni 2 da rabi a kowane lokaci. Gano saurin rafi? Zaɓuɓɓuka: (A) 9 kilomita a kowace awa (B) 6 km a kowace awa (C) 5 km a kowace awa (D) 8 km a kowace awa (E) 7 km / h Bari mu ba da wasu tunani na bazuwar kafin amsawa. <eng> Q: A man rows his boat 90 km downstream and 45 km upstream, taking 2 1/2 hours each time. Find the speed of the stream?
Options:
(A) 9 kmph
(B) 6 kmph
(C) 5 kmph
(D) 8 kmph
(E) 7 kmph Let's give some random thoughts before answering. 