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A biker increased his average speed by 10 miles per hour in each succe
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03 Nov 2023, 09:40
03 Nov 2023, 09:40
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Question Stats:
78% (01:50) correct
21% (03:53) wrong based on 14 sessions
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A biker increased his average speed by 10 miles per hour in each successive 10-minute interval after the first interval. If in the first 10-minute interval, his average speed was 30 miles per hour, how many miles did he travel in the fourth 10-minute interval?
(A) 4
(B) 5
(C) 8
(D) 10
(E) 15
(A) 4
(B) 5
(C) 8
(D) 10
(E) 15
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Free Materials for the GRE General Exam - Where to get it!!
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Free Materials for the GRE General Exam - Where to get it!!
GRE Geometry Formulas
GRE - Math Book
Re: A biker increased his average speed by 10 miles per hour in each succe
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15 Nov 2023, 17:17
15 Nov 2023, 17:17
1
The answer is (D).
Speed in the 2nd interval = 40 mph ; 3rd interval = 50 mph ; and 4th interval = 60 mph
Distance = Speed * Time = 60 mph * (10/60) hours = 10 miles
Speed in the 2nd interval = 40 mph ; 3rd interval = 50 mph ; and 4th interval = 60 mph
Distance = Speed * Time = 60 mph * (10/60) hours = 10 miles
gmatclubot
Re: A biker increased his average speed by 10 miles per hour in each succe [#permalink]
15 Nov 2023, 17:17
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