Question

Bill's upstream canoe trip took 2 hours longer than the return trip. If he averaged 2 mph on the upstream trip and 6 mph on the return trip, then how long was the upstream trip?

Answer 1

1. u = d + 2
And given they're the same distance:
2. u*2 = d*6

now substitute d+2 for u in the second equation:
(d+2)*2 = d*6
2d + 4 = 6d
4 = 6d-2d
4 = 4d
d= 1.
The downstream trip took 1 hour

Answer 2

thank you