Originally Posted by
Beastkun A stream has a current of 4mph. Find the speed of Joe's boat in still water if it goes 40mph downstream in the same time it takes to go 24 miles upstream.
I think I solved this correctly but I would like a second opinion/verification.
-------------------------D----- R ------ T
UP---------------------24---- 4-x
DOWN -----------------40 --- 4+x
so 24/4-x = 40/4+x
96+24x=160-40x
24x=64-40x
64x=64
x=1?
Something about this problem seems off, but I'm not sure... any tips or verification would be nice.