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In the figure above, what is the area of the circular region with cent

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In the figure above, what is the area of the circular region with cent  [#permalink]

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New post 17 Dec 2014, 07:05
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

82% (01:06) correct 18% (01:26) wrong based on 124 sessions

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Tough and Tricky questions: Geometry.



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In the figure above, what is the area of the circular region with center O ?

(1) MN is perpendicular to RS.
(2) The area of triangular region OMT is 4.

Kudos for a correct solution.

Attachment:
2014-12-17_1904.png
2014-12-17_1904.png [ 4.05 KiB | Viewed 2946 times ]

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Re: In the figure above, what is the area of the circular region with cent  [#permalink]

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New post 17 Dec 2014, 07:19
1. Obviously insufficient since we dont know exact lengths .Insuffice..

2. We cant determine radius of circle just by area of a triangle. Insuffice.

1+2>> we have (1/2)*OM*OT=4 ;OM=r but we dont know length of OT to detemine R.Hence Insufficeint

Ans E
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Re: In the figure above, what is the area of the circular region with cent  [#permalink]

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New post 17 Dec 2014, 21:00
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Bunuel wrote:

Tough and Tricky questions: Geometry.



Image
In the figure above, what is the area of the circular region with center O ?

(1) MN is perpendicular to RS.
(2) The area of triangular region OMT is 4.

Kudos for a correct solution.

Attachment:
2014-12-17_1904.png


To find the area of circle, we need to know the radius or OM or ON or OS or OR..

st1 MN perpendicular to RS...Does not help

st 2 says OM*OT=8...does not help

Combining we get..nothing new...

Ans E
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Re: In the figure above, what is the area of the circular region with cent  [#permalink]

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New post 17 Dec 2014, 22:22
Ans Is E cause we can not get the valUE OF THE the radius even by combining the 2 statements.
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Re: In the figure above, what is the area of the circular region with cent  [#permalink]

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New post 23 Dec 2014, 01:30
S(1): Helps us understand MOT is a right angled but no information about lengths. So area cannot be calculated. Not suff.
S(2): Gives area of the triangle using which we cannot calculate radius(OM). Hence Not suff.

Combining we get that MOT is a right angled Triangle hence 1/2*OM*OT=4. Using this we cannot calculate OM value. Thus insufficient.

Hence answer is E. Not sure how it is D. Would love to read the solution for this.
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Re: In the figure above, what is the area of the circular region with cent  [#permalink]

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New post 01 Dec 2018, 05:29
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Hi

Recheck OA, it is E.

Please see explanation, and tag in case of any confusion.

Thanks
soapbolt wrote:
Bunuel wrote:
Bunuel wrote:

Tough and Tricky questions: Geometry.



Image
In the figure above, what is the area of the circular region with center O ?

(1) MN is perpendicular to RS.
(2) The area of triangular region OMT is 4.

Kudos for a correct solution.

Attachment:
2014-12-17_1904.png


The correct answer is D.



Answer is D :dazed

Definitely need an explanation here

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Re: In the figure above, what is the area of the circular region with cent &nbs [#permalink] 01 Dec 2018, 05:29
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