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Math problem.. please help

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hartig
Posts: 8192 - Karma: 10
hey i need to figure out this math problem and i need help:
A boat is going 24 miles in 3 hours with the current, then it goes16 miles in 4 hours against the current. Find the rate of the boat in current, and the rate of the boat in still water.

please help me, i dont really know how to find the rate in still water
Oct 27 2005 8:24PM
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hartig
Posts: 8192 - Karma: 10
help
Oct 27 2005 8:26PM
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hartig
Posts: 8192 - Karma: 10
okay, i really though ns would be the place to ask this, cause you guys know everything... but no i guess not
Oct 27 2005 8:27PM
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n.i.c.k.
Posts: 1159 - Karma: 14
i know the answer. Its this: ?. you'll ghet it right for sure
Oct 27 2005 8:28PM
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hartig
Posts: 8192 - Karma: 10
thanks nick.. helps alot
Oct 27 2005 8:28PM
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ECfreeski3
Posts: 12019 - Karma: 126
justa sec ill get it in a sec, i have to finish somethign else first
Oct 27 2005 8:29PM
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hartig
Posts: 8192 - Karma: 10
^thanks
Oct 27 2005 8:30PM
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n.i.c.k.
Posts: 1159 - Karma: 14
anytime jordan, i have been given a gift of math skills, and i feel that its only fair if i share it with the world.
Oct 27 2005 8:32PM
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hartig
Posts: 8192 - Karma: 10
haha
Oct 27 2005 8:32PM
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ECfreeski3
Posts: 12019 - Karma: 126
it goes 8 mph with the current, 4 mph against the current, so it goes 6 mph in still water, right?
Oct 27 2005 8:33PM
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hartig
Posts: 8192 - Karma: 10
uhh.. no idea, but thanks. i really dont know how to do that.
Oct 27 2005 8:35PM
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ECfreeski3
Posts: 12019 - Karma: 126
are you saying you want to know how to do it?
the speed with the current 24/3, simplifies to 8/1, so 8mph. the speed against the current is 16/4, which simplifies to 4/1, so 4 mph. so you can either think about it logically from there and think that since the boat goes 8 mph with the current and 4 mph against it, its regular speed must be 6. or you can make two equations out of ths problem
(x=speed of boat
y=speed of current)
x+y=8
x-y=4
so use substitution to find x and y, and you have found x, the speed of the boat, and y, the speed of the current
Oct 27 2005 8:41PM
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sugarloaf
Posts: 7866 - Karma: 299
....he's clearly making that up. he talks in jibberish
Oct 27 2005 8:43PM
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hartig
Posts: 8192 - Karma: 10
no, i know how to do it, i just didnt know how to find the rate in still water
Oct 27 2005 8:44PM
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