Last visit was: 22 Dec 2024, 01:35 It is currently 22 Dec 2024, 01:35

Close

GRE Prep 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
Your Progress

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

Practice
Pays

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
Verbal Expert
Joined: 18 Apr 2015
Posts: 30451
Own Kudos [?]: 36808 [1]
Given Kudos: 26098
Send PM
Intern
Intern
Joined: 31 Dec 2019
Posts: 28
Own Kudos [?]: 26 [5]
Given Kudos: 14
Send PM
Verbal Expert
Joined: 18 Apr 2015
Posts: 30451
Own Kudos [?]: 36808 [2]
Given Kudos: 26098
Send PM
avatar
Intern
Intern
Joined: 01 Mar 2020
Posts: 2
Own Kudos [?]: 4 [3]
Given Kudos: 0
Send PM
Re: The radius of Circle Q is 8. If length of arc ABC is greater [#permalink]
3
# Length of arc in circle = circumference of circle * (center angle/ 360)
center angle(here) = <AQB +<BQC
SO, sum of center angle= (length of arc * 360)/ 2 * 3.14 * 8, where radius =8 and length of arc = 26 is given..
=(26*360)/2*3.14*8
=186.305
Therefore, sum of center angle must be greater than 186.305..
avatar
Intern
Intern
Joined: 14 Mar 2020
Posts: 41
Own Kudos [?]: 25 [2]
Given Kudos: 0
Send PM
Re: The radius of Circle Q is 8. If length of arc ABC is greater [#permalink]
2
Redius=8 So circumference =2*3.14*8=50.24
from the question we know that arc ABC is greater than 26 ( which means more than half of circle ), so the angle of arc ABC is also greater than half of the angle of circle (>180)

So , F and G are right answers
User avatar
Senior Manager
Senior Manager
Joined: 10 Feb 2020
Posts: 496
Own Kudos [?]: 354 [3]
Given Kudos: 299
Send PM
Re: The radius of Circle Q is 8. If length of arc ABC is greater [#permalink]
3
Arc length of a sector = angle/360 * (2*pi*r)
For AQB: Arc=angle1/360*(2*pi*8)
=angle1/360 * (16pi)
Same for BQC: angle2/360 * (16pi)

Now, Sum both values: angle1/360 * 16pi + angle2/360 * 16 pi
take common: angle1 + angle2 (16pi/360)
given that arc is greater than 26 so,
(16pi/360) angle1 + angle2 >26
angle1 + angle2 > (26 * 360) / 16 pi
=186.3
Hence sum of angles would be greater than this value so option F and G
User avatar
GRE Prep Club Legend
GRE Prep Club Legend
Joined: 07 Jan 2021
Posts: 5088
Own Kudos [?]: 76 [0]
Given Kudos: 0
Send PM
Re: The radius of Circle Q is 8. If length of arc ABC is greater [#permalink]
Hello from the GRE Prep Club BumpBot!

Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Prep Club for GRE Bot
Re: The radius of Circle Q is 8. If length of arc ABC is greater [#permalink]
Moderators:
GRE Instructor
88 posts
GRE Forum Moderator
37 posts
Moderator
1115 posts
GRE Instructor
234 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne