Last visit was: 26 May 2024, 23:15 It is currently 26 May 2024, 23:15
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: 93463
Own Kudos [?]: 626990 [1]
Given Kudos: 81958
Send PM
Senior Manager
Senior Manager
Joined: 21 Dec 2021
Posts: 330
Own Kudos [?]: 244 [2]
Given Kudos: 242
Send PM
Manager
Manager
Joined: 23 Apr 2021
Posts: 127
Own Kudos [?]: 41 [1]
Given Kudos: 115
Send PM
Quant Chat Moderator
Joined: 22 Dec 2016
Posts: 3136
Own Kudos [?]: 4502 [1]
Given Kudos: 1857
Location: India
Concentration: Strategy, Leadership
Send PM
Re: The surface area of cylinder A is how many times the surface area of [#permalink]
1
Kudos
Bunuel wrote:
The surface area of cylinder A is how many times the surface area of cylinder B?

(1) The diameter of A is twice the diameter of B.
(2) The height of A is equal to the height of B.


Total Surface Area of a Cylinder = \(2 * \pi * r^2 + 2 * \pi * r * h\)
= \(2 \pi r (r + h)\)

Statement 1 and Statement 2 are individually not sufficient as only one aspect of the dimension is provided.

Combined

Cylinder A :
  • Radius = 2r
  • Height = h

Cylinder B:
  • Radius = r
  • Height = h

\(\frac{TSA_A }{ TSA_B} = \frac{2 \pi *2r (2r + h) }{ 2 \pi r (r + h)}\)

\(\frac{TSA_A }{ TSA_B} = \frac{2(2r + h) }{ (r + h)}\)

As we cannot solve this further. The statements combined are not sufficient.

Option E
GMAT Club Bot
Re: The surface area of cylinder A is how many times the surface area of [#permalink]
Moderator:
Math Expert
93463 posts