What is the temperature in Celsius?

Expert replies

gmatpup: Senior | Next Rank: 100 Posts; Posts: 88; Joined: Sat Oct 15, 2011 6:38 pmFollowed by: 1 member; Thanked: 1 times

by gmatpup » Sat Dec 10, 2011 4:51 pm

Please help me with this question!

The formula F=9/5C+32 gives the relationship between the temperature in Fahrenheit and Celsius. If the temperature is 85 F, what is the temperature to the closest degree in Celsius?

A. 18 degrees C
B. 23 degrees C
C. 29 degrees C
D. 47 degrees C
E. 51 degrees C

The answer is C

Like this post

Source: Beat The GMAT — Problem Solving | Sat Dec 10, 2011 4:51 pm

GmatMathPro: GMAT Instructor; Posts: 349; Joined: Wed Sep 28, 2011 3:38 pmFollowed by: 54 members; Location: Austin, TX; Thanked: 236 times; GMAT Score:770

by GmatMathPro » Sat Dec 10, 2011 5:12 pm

gmatpup wrote:Please help me with this question!

The formula F=9/5C+32 gives the relationship between the temperature in Fahrenheit and Celsius. If the temperature is 85 F, what is the temperature to the closest degree in Celsius?

A. 18 degrees C
B. 23 degrees C
C. 29 degrees C
D. 47 degrees C
E. 51 degrees C

The answer is C

85=(9/5)C+32

53=(9/5)C

C=53(5/9)

53 is not divisible by 9, but 54 is. 54/9=6, 6*5=30. Since we rounded up the true answer must be slightly lower.

Pete Ackley
GMAT Math Pro
Free Online Tutoring Trial

Like this post

GMAT/MBA Expert

Anurag@Gurome: GMAT Instructor; Posts: 3835; Joined: Fri Apr 02, 2010 10:00 pmFollowed by: 523 members; Location: Milpitas, CA; Thanked: 1854 times; GMAT Score:770

by Anurag@Gurome » Sun Dec 11, 2011 4:06 am

gmatpup wrote:The formula F=9/5C+32 gives the relationship between the temperature in Fahrenheit and Celsius. If the temperature is 85 F, what is the temperature to the closest degree in Celsius?

It is given that F = (9/5)*C + 32
And the question is if F = 85, what is C?

--> 85 = (9/5)*C + 32
--> 53 = (9/5)*C
--> C = 53*(5/9)

53*(5/9) is slightly less than 54*(5/9) = 30

Hence, C must be approximately equal to 29.

The correct answer is C.

Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

Join Our Facebook Groups
GMAT with Gurome
https://www.facebook.com/groups/272466352793633/
Admissions with Gurome
https://www.facebook.com/groups/461459690536574/
Career Advising with Gurome
https://www.facebook.com/groups/360435787349781/

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

560 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review