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A circular tub has a band painted around its circumference

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A circular tub has a band painted around its circumference [#permalink] New post 26 Aug 2012, 02:19
Expert's post
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

88% (01:32) correct 11% (00:40) wrong based on 107 sessions
The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions Project

Attachment:
TUB.png
TUB.png [ 14.01 KiB | Viewed 2013 times ]
A circular tub has a band painted around its circumference, as shown above. What is the surface area of this painted band?

(1) x = 0.5
(2) The height of the tub is 1 meter.

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Question: 30
Page: 277
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Re: A circular tub has a band painted around its circumference [#permalink] New post 31 Aug 2012, 02:10
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SOLUTION:

Image
A circular tub has a band painted around its circumference, as shown above. What is the surface area of this painted band?

The surface area of the band is circumference of the band (circumference of the tub) multiplied by the width of the band.

(1) x = 0.5. We know the width of the band but not the circumference. Not sufficient.

(2) The height of the tub is 1 meter. From the height of the tub we cannot get neither the width of the band nor the circumference of the tub. Not sufficient.

(1)+(2) We still cannot get the circumference of the tub. Not sufficient.

Answer: E.
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RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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Re: A circular tub has a band painted around its circumference [#permalink] New post 31 Aug 2012, 02:18
I don't think, this is 650 level. Seems pretty easy to me.

We even don't have to calculate anything here.
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Re: A circular tub has a band painted around its circumference [#permalink] New post 31 Aug 2012, 02:25
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Re: A circular tub has a band painted around its circumference [#permalink] New post 31 Aug 2012, 02:44
The answer is E since we don't know the radius of the tub.
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Re: A circular tub has a band painted around its circumference   [#permalink] 31 Aug 2012, 02:44
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