NEW HERE? LEARN MORE
closeclose
Last visit was: 25 Apr 2024, 22:22 It is currently 25 Apr 2024, 22:22
Decision Tracker
My Rewards
New posts
New comers' posts

Close
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
Your Progress

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
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

A certain telescope increases the visual range at a particular locatio

SORT BY:
Date
Kudos
Tags:
Find Similar Topics 
Show Tags
Hide Tags
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92915
Own Kudos [?]: 619060 [5]
Given Kudos: 81595
Send PM
CAT Tests Forum Quiz Mode
A certain telescope increases the visual range at a particular locatio [#permalink] New post   26 Nov 2015, 06:04
2
Kudos
2
Bookmarks
Expert Reply
00:00
A
B
C
D
E

Difficulty:

5% (low)

Question Stats:

91% (00:41) correct 9% (00:50) wrong based on 644 sessions
Hide Show timer Statistics
A certain telescope increases the visual range at a particular location from 90 kilometers to 150 kilometers. By what percent is the visual range increased by using the telescope ?

(A) 30%
(B) 33 1/2%
(C) 40%
(D) 60%
(E) 66 2/3%
ShowHide Answer
Official Answer
E
User avatar
L
Skywalker18
Verbal Forum Moderator
Joined: 08 Dec 2013
Status:Greatness begins beyond your comfort zone
Posts: 2101
Own Kudos [?]: 8810 [5]
Given Kudos: 171
Location: India
Concentration: General Management, Strategy
GPA: 3.2
WE:Information Technology (Consulting)
Send PM
GMAT ToolKit User Reviews Badge
Re: A certain telescope increases the visual range at a particular locatio [#permalink] New post   26 Nov 2015, 07:45
3
Kudos
Original visual range = 90 km
New visual range = 150 km
Percent increase in the visual range by using the telescope
= (150-90)/90 * 100%
= 2/3 * 100%
= 66.67 %

Answer E
User avatar
L
Abhishek009
Board of Directors
Joined: 11 Jun 2011
Status:QA & VA Forum Moderator
Posts: 6072
Own Kudos [?]: 4689 [1]
Given Kudos: 463
Location: India
GPA: 3.5
WE:Business Development (Commercial Banking)
Send PM
GMAT ToolKit User
Re: A certain telescope increases the visual range at a particular locatio [#permalink] New post   26 Nov 2015, 11:59
1
Kudos
Same as Skywalker18

IMHO (E) - Unless there is a catch
User avatar
L
EMPOWERgmatRichC
GMAT Club Legend
GMAT Club Legend
Joined: 19 Dec 2014
Status:GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Posts: 21846
Own Kudos [?]: 11667 [2]
Given Kudos: 450
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Send PM
Re: A certain telescope increases the visual range at a particular locatio [#permalink] New post   26 Nov 2015, 16:38
2
Kudos
Expert Reply
Hi All,

Since this question asks for percent increase, we have the 'clue' that we need to use the Percent Change Formula...

Percent Change = (New - Old)/Old = Difference/Original

Since the original range is 90 and the new range is 150, we end up with....

(150-90)/90 = 60/90 = 2/3 = 66 2/3%

Final Answer:
Show Spoiler
E


GMAT assassins aren't born, they're made,
Rich
User avatar
L
ScottTargetTestPrep
Target Test Prep Representative
Joined: 14 Oct 2015
Status:Founder & CEO
Affiliations: Target Test Prep
Posts: 18761
Own Kudos [?]: 22055 [0]
Given Kudos: 283
Location: United States (CA)
Send PM
Re: A certain telescope increases the visual range at a particular locatio [#permalink] New post   23 Dec 2019, 18:13
Expert Reply
Bunuel wrote:
A certain telescope increases the visual range at a particular location from 90 kilometers to 150 kilometers. By what percent is the visual range increased by using the telescope ?

(A) 30%
(B) 33 1/2%
(C) 40%
(D) 60%
(E) 66 2/3%


The percent increase is:

(150 - 90)/90 x 100 = 60/90 x 100 = 66 2/3%

Answer: E
User avatar
B
sushant2143
Current Student
Joined: 14 Jun 2021
Posts: 30
Own Kudos [?]: 4 [0]
Given Kudos: 5
Location: India
Schools: ISB '23 (A) IIMA PGPX'23 (S)
GMAT 1: 680 Q47 V37
Send PM
Re: A certain telescope increases the visual range at a particular locatio [#permalink] New post   04 Sep 2021, 11:28
Pretty Easy Question,
Old range is 90 kms & New range is 150 kms
Percent increase= ((New - old) / old)*100
(150-90)/90 * 100%
2/3 * 100%
66.67 %
User avatar
S
Sneha2021
Senior Manager
Senior Manager
Joined: 20 Dec 2020
Posts: 287
Own Kudos [?]: 30 [0]
Given Kudos: 496
Location: India
Send PM
Re: A certain telescope increases the visual range at a particular locatio [#permalink] New post   29 Oct 2021, 11:21
The fastest approach is to estimate the answer using options
Let's start with D because we need a value greater than 50% (50% of 90 is 45), so we need a value greater than 50%
60% increase of 90 will be around 54 and difference is 60 (150-90), so ans must be greater than 60%.
Select E
User avatar
B
ArnauG
Senior Manager
Senior Manager
Joined: 23 Dec 2022
Posts: 318
Own Kudos [?]: 35 [0]
Given Kudos: 199
Send PM
Re: A certain telescope increases the visual range at a particular locatio [#permalink] New post   27 May 2023, 02:18
To calculate the percent increase in visual range, we need to find the difference between the initial range and the increased range, and then express that difference as a percentage of the initial range.

Initial visual range: 90 kilometers
Increased visual range: 150 kilometers

Difference in visual range: 150 km - 90 km = 60 km

Now, we'll calculate the percentage increase:
Percentage increase = (Difference / Initial range) * 100

Percentage increase = (60 km / 90 km) * 100 ≈ 66.67%

Therefore, the visual range is increased by approximately 66 2/3%, which corresponds to option (E) in the given choices.
GMAT Club Bot
gmatclubot
Re: A certain telescope increases the visual range at a particular locatio [#permalink]
27 May 2023, 02:18
Moderators:
Bunuel
Math Expert
92915 posts
yashikaaggarwal
Senior Moderator - Masters Forum
3137 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions