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

 It is currently 08 Dec 2019, 09:08

### 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

# A certain telescope X increases the visual range of a particular locat

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 59590
A certain telescope X increases the visual range of a particular locat  [#permalink]

### Show Tags

28 Jun 2017, 02:03
00:00

Difficulty:

65% (hard)

Question Stats:

50% (01:53) correct 50% (01:17) wrong based on 44 sessions

### HideShow timer Statistics

A certain telescope X increases the visual range of a particular location from 90 kilometers to 270 kilometers. Another telescope Y increases the visual range of another location from 45 kilometers to 180 kilometers. By what percent is the percent increase in visual range using Y more than that obtained using X?

(A) 33
(B) 50
(C) 75
(D) 100
(E) 150

_________________
Senior Manager
Joined: 28 May 2017
Posts: 276
Concentration: Finance, General Management
A certain telescope X increases the visual range of a particular locat  [#permalink]

### Show Tags

28 Jun 2017, 03:43
3
Bunuel wrote:
A certain telescope X increases the visual range of a particular location from 90 kilometers to 270 kilometers. Another telescope Y increases the visual range of another location from 45 kilometers to 180 kilometers. By what percent is the percent increase in visual range using Y more than that obtained using X?

(A) 33
(B) 50
(C) 75
(D) 100
(E) 150

Percent Increase in Visual Range by X = 180/90 = 200%
Percent Increase in Visual Range by Y = 135/45 = 300%

Kindly note that question is asking CHANGE in PERCENT INCREASE and not CHANGE in PERCENT

Question is ---Y is how much greater than X
Change = $$\frac{(300-200)}{200}$$
= 50%

Senior Manager
Joined: 28 Jun 2015
Posts: 279
Concentration: Finance
GPA: 3.5
Re: A certain telescope X increases the visual range of a particular locat  [#permalink]

### Show Tags

28 Jun 2017, 04:00
Telescope X: 90 + 180 = 270. So, increase = 200%.
Telescope Y: 45 + 135 = 180. So, increase = 300%.

Percentage increase in Y is more than percentage increase in X by 300-200/200 = 50%. Ans - B.
_________________
I used to think the brain was the most important organ. Then I thought, look what’s telling me that.
Re: A certain telescope X increases the visual range of a particular locat   [#permalink] 28 Jun 2017, 04:00
Display posts from previous: Sort by