Question

A boat requires four hours to travel a given distance upstream against a five mile per hour current, but only requires three hours to travel downstream with that same current back to the dock. Find the speed of the boat in still water.
PLEASE HELP!! Thanks

Answer 1

Hi jason it's Diana, Melissa just asked this one too

Answer 2

Seems like we are all in here.....lol

Answer 3

I'm stuck on number 8

Answer 4

let v be the speed of boat
when boat travels against,v-5=d/4
v+5=d/3
solving gives,v=7d/24

Answer 5

If it helps at all, this is what I came up with for this one..............
Boat speed = v
Current = 5 mph

Upstream against the current = v - 5
Downstream with the current = v + 5

Time traveling upstream = 4 hrs
Time traveling downstream = 3 hrs

4(v - 5) = 3(v + 5)
4v - 20 = 3v + 15
- 3v - 3v
v - 20 = 15
+ 20 +20
v = 35

The speed of the boat in still water is 35 mph

Answer 6

AWESOME! Thanks foe everyone help!

Answer 7

np, did you get number 8 yet?

Answer 8

8? Nickels and quarters question?

Answer 9

yes

Answer 10

Well I am Confused? Are you in my math class?

Answer 11

Class LOL

Answer 12

Well I am Confused? Are you in my math class?

Answer 13

yes