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

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

by BTGmoderatorDC » Thu May 09, 2019 4:12 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
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by Brent@GMATPrepNow » Thu May 09, 2019 4:40 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

OA D

Source: Magoosh
Here's how I would answer this in my head
Average speed = total distance/total time
= 1200/2.5
= 2400/5
= 4800/10
= 480

Answer: D

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by swerve » Thu May 09, 2019 6:00 am
Direct substitution into the formula

\(Speed = \frac{Distance}{Time}=\frac{1200\text{ miles}}{2.5\text{ hour}}=480\text{ mph}\).

Therefore, D
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by Scott@TargetTestPrep » Mon May 13, 2019 5:35 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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