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GRE Math Challenge #33-constant rate of r miles per hour
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07 Sep 2014, 06:48
07 Sep 2014, 06:48
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Question Stats:
64% (00:54) correct
35% (01:00) wrong based on 62 sessions
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Stan drove for h hours at a constant rate of r miles per hour. How many miles did he go during the final 20 minutes of his drive?
A. 20r
B. hr/3
C. 3rh
D. hr/20
E. r/3
A. 20r
B. hr/3
C. 3rh
D. hr/20
E. r/3
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Re: GRE Math Challenge #33-constant rate of r miles per hour
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23 Jul 2018, 17:29
23 Jul 2018, 17:29
Expert Reply
sandy wrote:
Stan drove for h hours at a constant rate of r miles per hour. How many miles did he go during the final 20 minutes of his drive?
A. 20r
B. hr/3
C. 3rh
D. hr/20
E. r/3
A. 20r
B. hr/3
C. 3rh
D. hr/20
E. r/3
We use the formula: distance = rate x time. Since 20 minutes = ⅓ hours, Stan went r x 1/3 = r/3 miles.
Answer: E
Re: GRE Math Challenge #33-constant rate of r miles per hour
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30 Apr 2023, 04:24
30 Apr 2023, 04:24
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