Laura and Brent paddled a canoe 6 miles upstream in four hours. The return trip took three hours. Find the rate at which Laura a

Question

Sauron [17]

3 years ago

10

Laura and Brent paddled a canoe 6 miles upstream in four hours. The return trip took three hours. Find the rate at which Laura a

nd Brent paddled the canoe is still water.

Mathematics

1 answer:

mixas84 [53] · Answer 1 · 2021-12-13T08:13:39+03:00

mixas84 [53]3 years ago

5 0

Call the rate in still water vs;
upstream you have: vs-v=6/4
downstram you have: vs+v=6/3
where v is the rate with which the river flows.
rearranging:
vs-v=3/2
vs+v=2
from the second you have v=2-vs substitute into the first:
vs-2+vs=3/2
2vs=7/2
vs=7 mi/hr