Boris is kayaking in a river with a 6
mph current. Suppose that he can kayak
4 miles upstream in the same amount of
time as it takes him to kayak 9 miles
downstream. Find the speed (mph) of
Boris’s kayak in still water.

Question

Boris is kayaking in a river with a 6
mph current. Suppose that he can kayak
4 miles upstream in the same amount of
time as it takes him to kayak 9 miles
downstream. Find the speed (mph) of
Boris’s kayak in still water.

anonymous · Answer

Just cant set it up, i got like a 4(x-6)=1 and a 9(x+6) = 1?

anonymous · Answer

v t = S 
Up stream:       ( v - 6 ) t = 4 miles 
Down stream : ( v + 6) t = 9 miles