GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 19 Oct 2018, 19:37

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

What is the area of a circular region that has circumference 8π?

Author Message
TAGS:

Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 50002
What is the area of a circular region that has circumference 8π?  [#permalink]

Show Tags

27 Nov 2017, 23:28
00:00

Difficulty:

15% (low)

Question Stats:

90% (00:23) correct 10% (00:47) wrong based on 45 sessions

HideShow timer Statistics

What is the area of a circular region that has circumference 8π?

(A) 4π
(B) 8π
(C) 16π
(D) 32π
(E) 64π

_________________
Senior Manager
Joined: 17 Oct 2016
Posts: 322
Location: India
Concentration: Operations, Strategy
GPA: 3.73
WE: Design (Real Estate)
Re: What is the area of a circular region that has circumference 8π?  [#permalink]

Show Tags

28 Nov 2017, 00:23
C

Radius of the circle = 8.pi/(2.pi)

Hence area = pi.4^2
=16.pi

Sent from my iPhone using GMAT Club Forum
_________________

Help with kudos if u found the post useful. Thanks

Senior SC Moderator
Joined: 22 May 2016
Posts: 2035
What is the area of a circular region that has circumference 8π?  [#permalink]

Show Tags

28 Nov 2017, 16:57
Bunuel wrote:
What is the area of a circular region that has circumference 8π?

(A) 4π
(B) 8π
(C) 16π
(D) 32π
(E) 64π

Circumference = 2πr
2πr = 8π
r = 4

Area = $$πr^2 = 16π$$

_________________

___________________________________________________________________
For what are we born if not to aid one another?
-- Ernest Hemingway

Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 3896
Location: United States (CA)
Re: What is the area of a circular region that has circumference 8π?  [#permalink]

Show Tags

29 Nov 2017, 18:16
1
Bunuel wrote:
What is the area of a circular region that has circumference 8π?

(A) 4π
(B) 8π
(C) 16π
(D) 32π
(E) 64π

Since the circumference of a circle is given by C = 2πr, we can create the equation:

8π = 2πr

4 = r

So the area is π x 4^2 = 16π.

_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Re: What is the area of a circular region that has circumference 8π? &nbs [#permalink] 29 Nov 2017, 18:16
Display posts from previous: Sort by