Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

Charlie takes 2.5 hours to fly from Los Angeles to Mexico

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Moderator
Posts: 2650
Joined: Sun Oct 15, 2017 1:50 pmFollowed by: 6 members
by BTGmoderatorLU » Mon Oct 15, 2018 2:36 pm
Timer
00:00
Your answer
Difficulty–

right wrong

Pick an answer to see how members did

Source: Magoosh

Charlie takes 2.5 hours to fly from Los Angeles to Mexico City, a distance of 1200 miles. What is the average speed of his plane in miles per hour?

A. 200 mph
B. 240 mph
C. 410 mph
D. 480 mph
E. 533 mph

The OA is D
Top
Join the discussion
Source: — Problem Solving |

GMAT/MBA Expert

User avatar
Elite Legendary Member
Posts: 10391
Joined: Sun Jun 23, 2013 6:38 pmFollowed by: 511 members
Location: Palo Alto, CA
Thanked: 2867 times
GMAT Score:800

by [email protected] » Mon Oct 15, 2018 9:21 pm
Hi All,

We're told that Charlie takes 2.5 hours to fly from Los Angeles to Mexico City, which is a total distance of 1200 miles. We're asked for the average speed of his plane in miles per hour. This is a straight-forward 'Average Speed' question, so we can just plug in the numbers at get the answer. There is a minor math move that you can make to save you some effort though...

Total Distance = (Av. Sp.)(Total Time)
1200 = (Av.Sp.)(2.5 hours)
1200/2.5 = Av.Sp.

At this point, instead of dividing 1200 by 2.5, you might find it useful to multiply both the numerator and denominator by 2 (to get rid of the decimal point):
2400/5 = Av.Sp.
480 = Av.Sp.

Final Answer: D

GMAT assassins aren't born, they're made,
Rich
Contact Rich at [email protected]
Image
Top
Join the discussion

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16206
Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members
Location: Vancouver, BC
Thanked: 5254 times
GMAT Score:770

by Brent@GMATPrepNow » Tue Oct 16, 2018 4:59 am
BTGmoderatorLU wrote:Source: Magoosh

Charlie takes 2.5 hours to fly from Los Angeles to Mexico City, a distance of 1200 miles. What is the average speed of his plane in miles per hour?

A. 200 mph
B. 240 mph
C. 410 mph
D. 480 mph
E. 533 mph

The OA is D
Average speed = (total distance traveled)/(total travel time)

So, Average speed = 1200/2.5 = 2400/5 = 4800/10 = 480 mph

Answer: D

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
User avatar
GMAT Instructor
Posts: 1449
Joined: Sat Oct 09, 2010 2:16 pmFollowed by: 33 members
Thanked: 59 times

by fskilnik@GMATH » Tue Oct 16, 2018 10:39 am
BTGmoderatorLU wrote:Source: Magoosh

Charlie takes 2.5 hours to fly from Los Angeles to Mexico City, a distance of 1200 miles. What is the average speed of his plane in miles per hour?

A. 200 mph
B. 240 mph
C. 410 mph
D. 480 mph
E. 533 mph
\[?\,\, = \,\,\frac{{\# \,\,{\text{total}}\,\,{\text{miles}}}}{{\# \,\,{\text{total}}\,\,{\text{hours}}}}\,\, = \,\,\,\underleftrightarrow {\frac{{120 \cdot 10}}{{\frac{5}{2}}} = \frac{{120 \cdot 10 \cdot 2}}{5}} = 4 \cdot 120\,\,\,\left[ {{\text{mph}}} \right]\]
This solution follows the notations and rationale taught in the GMATH method.

Regards,
Fabio.
Fabio Skilnik :: GMATH method creator ( Math for the GMAT)
English-speakers :: https://www.gmath.net
Portuguese-speakers :: https://www.gmath.com.br
Top
Join the discussion

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 8246
Joined: Sat Apr 25, 2015 10:56 amFollowed by: 29 members
Location: Los Angeles, CA
Thanked: 43 times

by Scott@TargetTestPrep » Tue Oct 16, 2018 5:14 pm
BTGmoderatorLU wrote:Source: Magoosh

Charlie takes 2.5 hours to fly from Los Angeles to Mexico City, a distance of 1200 miles. What is the average speed of his plane in miles per hour?

A. 200 mph
B. 240 mph
C. 410 mph
D. 480 mph
E. 533 mph
We can use the formula:

average = (total distance)/(total time)

average = 1200/2.5 = 480 mph

Answer: D

Scott Woodbury-Stewart
Founder and CEO
[email protected]

Image

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews

ImageImage
Top
Join the discussion