 
<translate> Tambaya Wani mutum yana tuka jirginsa mai nisan kilomita 70 kuma mai nisan kilomita 45 a sama, yana ɗaukar awa 2 da rabi a kowane lokaci. Gano saurin rafi? Zaɓuɓɓuka: (A) 1 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 a kowace awa <eng> The question A man rows his boat 70 km downstream and 45 km upstream, taking 2 1/2 hours each time. Find the speed of the stream?
Options:
(A) 1 kmph
(B) 6 kmph
(C) 5 kmph
(D) 8 kmph
(E) 7 kmph 