 
 <translate> Use some thinking to answer the following question. A man rows his boat 84 km downstream and 48 km upstream, taking 2 hours each time. Find the speed of the stream?
Options:
(A) 6 kmph
(B) 5 kmph
(C) 9 kmph
(D) 8 kmph
(E) 1 kmph <ibo> Chebara ajụjụ na-esonụ echiche. Otu nwoke na-eji ụgbọ epeepe ya akwọga kilomita iri asatọ na anọ ma kwọwa kilomita iri anọ na asatọ, na-eji awa abụọ akwọ ya. Chọta ọsọ nke iyi ahụ? Nhọrọ: (A) 6 kmph (B) 5 kmph (C) 9 kmph (D) 8 kmph (E) 1 kmph 