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A monkey is at the bottom of a 30 foot well. Each day he jumps up thre
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Bunuel
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A monkey is at the bottom of a 30 foot well. Each day he jumps up thre [#permalink] New post  31 Jan 2021, 02:08
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A monkey is at the bottom of a 30 foot well. Each day he jumps up three feet and slips back two. At that rate, in how many days will the monkey reach the top of the well ?

A. 27
B. 28
C. 29
D. 30
E. 31
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Re: A monkey is at the bottom of a 30 foot well. Each day he jumps up thre [#permalink] New post  31 Jan 2021, 02:58
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Bunuel wrote:
A monkey is at the bottom of a 30 foot well. Each day he jumps up three feet and slips back two. At that rate, in how many days will the monkey reach the top of the well ?

A. 27
B. 28
C. 29
D. 30
E. 31


Every day net ascend = +3 - 2 = 1 foot

Total Height = 30 feet

in 27 days, total ascend = 27 feet

on 28th days he goes 3 foot high first i.e. He achieves height of 30 feet on 28th Day

Answer: Option B
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