Last visit was: 23 Jul 2024, 14:26 It is currently 23 Jul 2024, 14:26
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.
Close
Request Expert Reply
Confirm Cancel
SORT BY:
Date
Tags:
Show Tags
Hide Tags
Math Expert
Joined: 02 Sep 2009
Posts: 94589
Own Kudos [?]: 643366 [0]
Given Kudos: 86728
Send PM
GMAT Club Legend
GMAT Club Legend
Joined: 03 Oct 2013
Affiliations: CrackVerbal
Posts: 4915
Own Kudos [?]: 7815 [2]
Given Kudos: 221
Location: India
Send PM
GMAT Tutor
Joined: 24 Jun 2008
Posts: 4127
Own Kudos [?]: 9462 [0]
Given Kudos: 91
 Q51  V47
Send PM
Manager
Manager
Joined: 24 Nov 2017
Posts: 71
Own Kudos [?]: 193 [3]
Given Kudos: 1
Location: India
GMAT 1: 720 Q51 V36
Send PM
Re: The official height of a skyscraper is equal to the elevation of the [#permalink]
2
Kudos
1
Bookmarks
Bunuel wrote:
The official height of a skyscraper is equal to the elevation of the roof plus the height of the spire atop the roof. The height of the spire on a certain skyscraper is what percent of the official height?

(1) The spire on the skyscraper is 25 percent of the elevation of the roof.
(2) The official height of the skyscraper is 1,000 meters.


The Question
Compute the height of the spire as a percent of the official height of the skyscraper.

The required percentage = \(\frac{(Height of Spire)}{(Official height of skyscraper)}\) * 100

Additional data from question stem: The official height of a skyscraper is equal to the elevation of the roof plus the height of the spire atop the roof

When is the data sufficient?
If from the statements we can compute a unique value for the percentage, the data is sufficient.

Evaluate Statement 1 ALONE : The spire on the skyscraper is 25 percent of the elevation of the roof.
So, the official height of the skyscraper = elevation of roof + height of the spire
= elevation of the roof + 25% of the elevation of the roof = 125% of the elevation of the roof.

Required percent = \(\frac{(25 percent of the elevation of the roof)}{(125 percent of the elevation of the roof)}\) * 100

Statement 1 ALONE provides a unique answer.
Choices A or D.

Evaluate Statement 2 ALONE: The official height of the skyscraper is 1,000 meters.
The break up between the elevation of roof and the height of the spire is not known.
So, we will not be able to find the percentage using statement 2 alone.

Choice A is the answer
GMAT Club Bot
Re: The official height of a skyscraper is equal to the elevation of the [#permalink]
Moderator:
Math Expert
94589 posts