I have the algebra problem:
If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of
the river and the rate of the boat in still water respectively are ________?
a. 7 &16 mph
c. 6 &17 mph
d. 6 &18
I know the forumla is r x t = d however i come up with 26 & 10
am i approaching this incorrectly?