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

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

I'm stuck on number 8

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

AWESOME! Thanks foe everyone help!

anonymous · Answer

np, did you get number 8 yet?

anonymous · Answer

8? Nickels and quarters question?

anonymous · Answer

yes

anonymous · Answer

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

anonymous · Answer

Class LOL

anonymous · Answer

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

anonymous · Answer

yes