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# When a certain tree was first planted, it was 4 ft tall

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Manager
Joined: 05 May 2005
Posts: 78
When a certain tree was first planted, it was 4 ft tall [#permalink]

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11 Dec 2008, 10:23
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Here is a problem from GMATPrep, Practice Test 1:

When a certain tree was first planted, it was 4 ft tall, and the height of the tree increased by a constant amount each year for the next 6 years. At the end of the 6th year, the tree was 1/5 taller than it was at the end of the 4th year. By how many feet did the height of the tree increase each year?

a) 3/10

b) 2/5

c) 1/2

d) 2/3

e) 6/5
SVP
Joined: 30 Apr 2008
Posts: 1855
Location: Oklahoma City
Schools: Hard Knocks

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11 Dec 2008, 11:10
Check this post out. that's a common question here.

post537305.html
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J Allen Morris
**I'm pretty sure I'm right, but then again, I'm just a guy with his head up his a\$\$.

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Manager
Joined: 15 Apr 2008
Posts: 161

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11 Dec 2008, 13:38

i have solved this keeping in mind that the tree is increasing by a constant amount and not constant rate
Manager
Joined: 05 May 2005
Posts: 78

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11 Dec 2008, 17:13
J Allen, thanks for the link and your thorough explanation there. I thought that it was the most thorough explanation there and it made me understand the concept being asked. Keep up the great posts!
Re: Increase/constant rate problem   [#permalink] 11 Dec 2008, 17:13
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# When a certain tree was first planted, it was 4 ft tall

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