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# A well 100 meters deep is drilled at the base of a mountain 1000 meter

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Joined: 02 Sep 2009
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A well 100 meters deep is drilled at the base of a mountain 1000 meter  [#permalink]

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02 Oct 2017, 01:08
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Question Stats:

82% (00:49) correct 18% (01:01) wrong based on 57 sessions

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A well 100 meters deep is drilled at the base of a mountain 1000 meters high whose peak is 2,000 meters above sea level. How many meters above sea level is the botttom of the well?

(A) 900
(B) 1000
(C) 1100
(D) 1900
(E) 2100

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Re: A well 100 meters deep is drilled at the base of a mountain 1000 meter  [#permalink]

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02 Oct 2017, 02:03
1
Bunuel wrote:
A well 100 meters deep is drilled at the base of a mountain 1000 meters high whose peak is 2,000 meters above sea level. How many meters above sea level is the botttom of the well?

(A) 900
(B) 1000
(C) 1100
(D) 1900
(E) 2100

Since the mountain is 2000 meters above sea level
and the base of the mountain 1000 meters high,
the well is drilled from 1000 meters above the sea level.

Therefore, since the well is around 100 meters deep,
the bottom of the well will be 900(1000-100) meters above sea level(Option A)
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Re: A well 100 meters deep is drilled at the base of a mountain 1000 meter  [#permalink]

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02 Oct 2017, 05:28
1
Bunuel wrote:
A well 100 meters deep is drilled at the base of a mountain 1000 meters high whose peak is 2,000 meters above sea level. How many meters above sea level is the botttom of the well?

(A) 900
(B) 1000
(C) 1100
(D) 1900
(E) 2100

Attachment:

sealevelwellmtn.png [ 3.87 KiB | Viewed 619 times ]

Sea level = 0
Mountain top is at +2000 (above sea level)
Bottom of mountain is at + 1000 (above sea level)
Well drilled from bottom of mountain goes down 100 meters

Bottom of well is how many meters above sea level?

+ 1000 (bottom of mountain)
__-100
= 900

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Re: A well 100 meters deep is drilled at the base of a mountain 1000 meter  [#permalink]

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02 Oct 2017, 06:37
1
Bunuel wrote:
A well 100 meters deep is drilled at the base of a mountain 1000 meters high whose peak is 2,000 meters above sea level. How many meters above sea level is the botttom of the well?

(A) 900
(B) 1000
(C) 1100
(D) 1900
(E) 2100

From the top of the mountain..
a. Sea level is at 2000 m depth.
b. Bottom of mountain is at 1000 m depth.
c. Bottom of well is at 1000 + 100 = 1100 m depth.

So, bottom of well is 2000 - 1100 = 900 m above sea level..

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Re: A well 100 meters deep is drilled at the base of a mountain 1000 meter  [#permalink]

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04 Oct 2017, 16:35
Bunuel wrote:
A well 100 meters deep is drilled at the base of a mountain 1000 meters high whose peak is 2,000 meters above sea level. How many meters above sea level is the botttom of the well?

(A) 900
(B) 1000
(C) 1100
(D) 1900
(E) 2100

If the mountain is 1000 meters high and its peak is 2000 meters above sea level, its base is 2000 - 1000 = 1000 meters above sea level.

Since the well is 100 meters deep and it’s drilled at the base of the mountain, the bottom of the well is 1000 - 100 = 900 meters above sea level.

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Re: A well 100 meters deep is drilled at the base of a mountain 1000 meter &nbs [#permalink] 04 Oct 2017, 16:35
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