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# When a certain tree was planted , it was 4 feet tall and its

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Joined: 28 Jul 2004
Posts: 135
Location: Melbourne
Schools: Yale SOM, Tuck, Ross, IESE, HEC, Johnson, Booth
When a certain tree was planted , it was 4 feet tall and its [#permalink]

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02 Jan 2009, 20:40
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When a certain tree was planted , it was 4 feet tall and its height increased by constant amount each year for next 6 yrs. At end of 6th year it was 1/5 taller than at the end of 4th year. By how many feet the height increased evey year.

1) 3/10
2) 2/5
3) 1/2
4) 2/3
5) 6/5

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kris

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Joined: 29 Aug 2007
Posts: 2467

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03 Jan 2009, 00:28
krishan wrote:
When a certain tree was planted , it was 4 feet tall and its height increased by constant amount each year for next 6 yrs. At end of 6th year it was 1/5 taller than at the end of 4th year. By how many feet the height increased evey year.

1) 3/10
2) 2/5
3) 1/2
4) 2/3
5) 6/5

7-p537339?t=72570&hilit=taller#p537339
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Joined: 05 Jul 2008
Posts: 1401

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03 Jan 2009, 14:45
1
KUDOS
krishan wrote:
When a certain tree was planted , it was 4 feet tall and its height increased by constant amount each year for next 6 yrs. At end of 6th year it was 1/5 taller than at the end of 4th year. By how many feet the height increased evey year.

1) 3/10
2) 2/5
3) 1/2
4) 2/3
5) 6/5

If x is the amount of height increase every yr,

4+6x = (4+4x) + 1/5(4+4x)

Solve for x to get 2/3
Re: Height of tree   [#permalink] 03 Jan 2009, 14:45
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# When a certain tree was planted , it was 4 feet tall and its

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