Runners \(X\) and \(Y\) started an \(18\)-mile race at the same time. Runner \(X\) completed the course in \(6\) hours,

This topic has expert replies
Legendary Member
Posts: 2276
Joined: Sat Oct 14, 2017 6:10 am
Followed by:3 members

Timer

00:00

Your Answer

A

B

C

D

E

Global Stats

Runners \(X\) and \(Y\) started an \(18\)-mile race at the same time. Runner \(X\) completed the course in \(6\) hours, and Runner \(Y\) finished \(2\) hours earlier. Runner \(Y\) ran an average of how many miles per hour faster than Runner \(X?\)

A. \(1\)

B. \(1\frac12\)

C. \(2\frac14\)

D. \(3\)

E. \(4\frac12\)

[spoiler]OA=B[/spoiler]

Source: Princeton Review
Source: — Problem Solving |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 8086
Joined: Sat Apr 25, 2015 10:56 am
Location: Los Angeles, CA
Thanked: 43 times
Followed by:29 members
VJesus12 wrote:
Thu Jul 30, 2020 9:17 am
Runners \(X\) and \(Y\) started an \(18\)-mile race at the same time. Runner \(X\) completed the course in \(6\) hours, and Runner \(Y\) finished \(2\) hours earlier. Runner \(Y\) ran an average of how many miles per hour faster than Runner \(X?\)

A. \(1\)

B. \(1\frac12\)

C. \(2\frac14\)

D. \(3\)

E. \(4\frac12\)

[spoiler]OA=B[/spoiler]

Solution:

The average speed of runner X is 18/6 = 3 mph, and the average speed of runner Y is 18/4 = 4.5 mph. Therefore, the average speed of runner Y is 4.5 - 3 = 1.5 mph faster than the average speed of runner X.

Answer: B

Scott Woodbury-Stewart
Founder and CEO
[email protected]

Image

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews

ImageImage