 
<translate> Ajụjụ: Ọsọ ụgbọ mmiri na-agba n'ime mmiri dị jụụ bụ 40kmph na ọsọ nke mmiri na-agba bụ 20kmph. Chọta ọsọ na-agbadata na nke na-agbago? Nhọrọ: (A) 40, 68 kmph (B) 40, 30 kmph (C) 90, 60 kmph (D) 40, 60 kmph (E) 60, 20 kmph Ka anyị nye ụfọdụ echiche na-enweghị isi tupu ịza. <eng> Q: The speed of a boat in still water is 40kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?
Options:
(A) 40, 68 kmph
(B) 40, 30 kmph
(C) 90, 60 kmph
(D) 40, 60 kmph
(E) 60, 20 kmph Let's give some random thoughts before answering. 