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

 It is currently 26 May 2019, 10:18

### 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 approximate distance around the outer edge of a circular

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 55277
What is the approximate distance around the outer edge of a circular  [#permalink]

### Show Tags

12 Sep 2018, 00:23
00:00

Difficulty:

45% (medium)

Question Stats:

54% (01:45) correct 46% (02:03) wrong based on 15 sessions

### HideShow timer Statistics

What is the approximate distance around the outer edge of a circular track with an area of 145 square feet?

A. 46 feet
B. 42 feet
C. 36 feet
D. 24 feet
E. 21 feet

_________________
VP
Status: Learning stage
Joined: 01 Oct 2017
Posts: 1008
WE: Supply Chain Management (Energy and Utilities)
Re: What is the approximate distance around the outer edge of a circular  [#permalink]

### Show Tags

12 Sep 2018, 03:16
Bunuel wrote:
What is the approximate distance around the outer edge of a circular track with an area of 145 square feet?

A. 46 feet
B. 42 feet
C. 36 feet
D. 24 feet
E. 21 feet

Given $$\pi*r^2=145$$ or, $$r=\sqrt{\frac{145}{\pi}}$$=7(approx.) [144/3=48, $$\sqrt{49}=7$$]

To find:- distance around the outer edge of a circular track=$$2*\pi*r$$=2*3*7=42

Ans. (B)
_________________
Regards,

PKN

Rise above the storm, you will find the sunshine
Re: What is the approximate distance around the outer edge of a circular   [#permalink] 12 Sep 2018, 03:16
Display posts from previous: Sort by