
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
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September 10th, 2007, 04:57 PM  #1 
Joined: Sep 2007 Posts: 2 Thanks: 0  Snail problem... find the equation algebrically..
A snail decides to climb a 12 meter well. Every day, he climbs 3 meters in the daytime and slides 2 meters at night. After how many days will he finally arrive at the other side of the well? 
September 10th, 2007, 05:43 PM  #2  
Global Moderator Joined: Nov 2006 From: UTC 5 Posts: 12,866 Thanks: 95  Re: Snail problem... find the equation algebrically.. Quote:
What do you have so far?  
September 11th, 2007, 01:36 PM  #3  
Global Moderator Joined: May 2007 Posts: 3,830 Thanks: 33  Re: Snail problem... find the equation algebrically.. Quote:
 
September 11th, 2007, 04:10 PM  #4 
Joined: Dec 2006 Posts: 1,111 Thanks: 0 
Suppose that the rate at which the snail traveled decreased at a nonconstant rate depending upon how long he had been traveling, and also depending upon the amount of salt being poured on him? :P

September 11th, 2007, 04:42 PM  #5  
Joined: Sep 2007 Posts: 2 Thanks: 0  Re: Snail problem... find the equation algebrically.. Quote:
 
September 11th, 2007, 05:05 PM  #6  
Global Moderator Joined: Nov 2006 From: UTC 5 Posts: 12,866 Thanks: 95  Quote:
 
September 12th, 2007, 12:49 PM  #7  
Global Moderator Joined: May 2007 Posts: 3,830 Thanks: 33  Re: Snail problem... find the equation algebrically..
[quote=helpmeplz!] Quote:
H(n)=3+(n1), where H is height after n days. Since you want H(n)=10, I think you can do the rest.  
September 12th, 2007, 01:38 PM  #8 
Joined: Aug 2007 From: turkey Posts: 57 Thanks: 0 
11 day

September 12th, 2007, 04:00 PM  #9  
Global Moderator Joined: Dec 2006 Posts: 10,493 Thanks: 29  Quote:
 
October 2nd, 2007, 11:20 AM  #10  
Joined: Sep 2007 Posts: 13 Thanks: 0  Quote:
 
October 2nd, 2007, 11:26 AM  #11  
Joined: Sep 2007 Posts: 13 Thanks: 0  Re: Snail problem... find the equation algebrically..
[quote=mathman] Quote:
Re u sure this equation is giving the general solution? So if we think we got 12meters to take and if we got [one in a day] 3 steps up & 2 steps down( totally 1 step up) in 9 days we take 9 meters and 10th day first of all we ll take 3 steps up and we re 12 meters up already. Now c it at the solution; u say H(n)=10 so then 3+(n1)=10 and we've got n=8 here :/ I thnk thats not true.  
October 2nd, 2007, 01:31 PM  #12 
Global Moderator Joined: Dec 2006 Posts: 10,493 Thanks: 29 
I think "10" was just "12" mistyped. Here's the trickier problem. Forget algebra; just try to solve it correctly. A snail decides to climb a 20 foot wall (whose width may be ignored) and then climb down the other side of the wall. He can climb up 3 feet in the daytime, but slides down 2 feet at night. Each day consists of 12 hours of daytime followed by 12 hours of nighttime, so the snail is 1 foot up the wall at the end of the first 24hour day. After how long will he finally arrive at the foot of the other side of the wall? (I've used feet to distinguish this problem from the previous one.) Boring answers are wrong; you will know when you have the right answer! 
October 3rd, 2007, 10:46 AM  #13  
Joined: Sep 2007 Posts: 13 Thanks: 0  Quote:
lol it can never arrive at the foot of the other side of the wall 'coz when it ll reach at the top of the wall it ll be 17th day and on the 18th day "climbin 3 feet in the daytime and slides 2 feet at the night" means ll be different(opposite)for it. thats why it can never reach to the foot point of the otherside of the wall.  
October 3rd, 2007, 12:33 PM  #14  
Global Moderator Joined: Dec 2006 Posts: 10,493 Thanks: 29  Quote:
 

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algebrically, equation, find, problem, snail 
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