Charlie takes 2.5 hours to fly from Los Angeles to Mexico Ci

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

by BTGmoderatorDC » Tue Dec 04, 2018 7:07 am

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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

OA D

Source: Magoosh

Source: Beat The GMAT — Problem Solving | Tue Dec 04, 2018 7:07 am

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Brent@GMATPrepNow: 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 Dec 04, 2018 8:32 am

BTGmoderatorDC wrote: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

Average speed = (total distance traveled)/(total travel time)

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

Answer: D

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Brent

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Scott@TargetTestPrep: 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 » Sun Mar 24, 2019 5:11 pm

BTGmoderatorDC wrote: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

OA D

Source: Magoosh

We can use the formula:

average = (total distance)/(total time)

average = 1200/2.5 = 480 mph

Answer: D

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