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An aircraft flew 600 miles to a town at an average speed of 400 miles
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10 Nov 2023, 03:00
10 Nov 2023, 03:00
Expert Reply
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Question Stats:
78% (01:25) correct
21% (00:21) wrong based on 14 sessions
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An aircraft flew 600 miles to a town at an average speed of 400 miles per hour and made the return trip following the same route at an average speed of 500 miles per hour. Which of the following is aircraft’s approximate average speed, in miles per hour, for the trip?
(A) 420
(B) 444
(C) 450
(D) 467
(E) 483
(A) 420
(B) 444
(C) 450
(D) 467
(E) 483
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Free Materials for the GRE General Exam - Where to get it!!
GRE Geometry Formulas
GRE - Math Book
An aircraft flew 600 miles to a town at an average speed of 400 miles
[#permalink]
14 Nov 2023, 03:06
14 Nov 2023, 03:06
1
The answer is (B).
Average Speed = Total Distance / Total Time
Time while going = 600/400 = 1.5 hours
Time while returning = 600/500 = 1.2 hours
--> Speed = (600 + 600)/ (1.5 + 1.2) = 1200/2.7 = 444.44 miles per hour
Average Speed = Total Distance / Total Time
Time while going = 600/400 = 1.5 hours
Time while returning = 600/500 = 1.2 hours
--> Speed = (600 + 600)/ (1.5 + 1.2) = 1200/2.7 = 444.44 miles per hour
gmatclubot
An aircraft flew 600 miles to a town at an average speed of 400 miles [#permalink]
14 Nov 2023, 03:06
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