Question

as you take a short canoe trip on the Brazos River you paddle your canoe 200 miles up the river in 420 seconds and then turn around and paddle 350 miles down the river in 280 seconds what was your average speed during your canoe trip in miles per second​

Answer 1

200 miles/420 secs = 10/21
350 mile/280 secs = 5/4

(5/4+10/21)/2= 145/168 miles per sec
or .86 miles/sec