If the population of a certain country is 120,256,000 and its land area is 2,998,000 square kilometers, then the

Expert replies

Previous Topic Next Topic

BTGmoderatorDC: Moderator; Posts: 7187; Joined: Thu Sep 07, 2017 4:43 pmFollowed by: 23 members

by BTGmoderatorDC » Mon Jan 31, 2022 5:40 pm

Timer

00:00

Answers

Stats

Difficulty—

If the population of a certain country is 120,256,000 and its land area is 2,998,000 square kilometers, then the population per square kilometer is closest to which of the following?

A. 4
B. 6
C. 20
D. 40
E. 60

OA D

Source: GMAT Prep

Like this post

Source: Beat The GMAT — Problem Solving | Mon Jan 31, 2022 5:40 pm

GMAT/MBA Expert

Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

Re: If the population of a certain country is 120,256,000 and its land area is 2,998,000 square kilometers, then the

by Brent@GMATPrepNow » Mon Mar 07, 2022 8:15 am

BTGmoderatorDC wrote: ↑
Mon Jan 31, 2022 5:40 pm
If the population of a certain country is 120,256,000 and its land area is 2,998,000 square kilometers, then the population per square kilometer is closest to which of the following?

A. 4
B. 6
C. 20
D. 40
E. 60

OA D

Source: GMAT Prep

STRATEGY: This question is a great example of why we should always check the answer choices before committing to a specific solution method (see the video below for more on this).
When we check the answers choices, we see that they are quite spread apart (relatively speaking), which means we can use approximate values to determine the correct answer.

Population per square kilometer = (total population)/(total area in square kilometers)
= 120,256,000/2,998,000
≈ 120,000,000/3,000,000
≈ 120/3
≈ 40

Answer: D

RELATED VIDEO: https://www.youtube.com/watch?v=8GqcJGUVIk4

Brent Hanneson - Creator of GMATPrepNow.com

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