Walking at a constant rate of 8 kilometers per hour, Juan can

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BTGModeratorVI: Legendary Member; Posts: 1223; Joined: Sat Feb 15, 2020 2:23 pmFollowed by: 1 member

by BTGModeratorVI » Sat Mar 21, 2020 9:47 am

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Walking at a constant rate of 8 kilometers per hour, Juan can cross a bridge in 6 minutes. What is the length of the bridge in meters? (1 kilometer = 1000 meters)

A. 480
B. 600
C. 720
D. 750
E. 800

Answer: E
Source: Magoosh

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Source: Beat The GMAT — Problem Solving | Sat Mar 21, 2020 9:47 am

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

Re: Walking at a constant rate of 8 kilometers per hour, Juan can

by Brent@GMATPrepNow » Mon Mar 23, 2020 9:32 am

BTGModeratorVI wrote: ↑
Sat Mar 21, 2020 9:47 am
Walking at a constant rate of 8 kilometers per hour, Juan can cross a bridge in 6 minutes. What is the length of the bridge in meters? (1 kilometer = 1000 meters)

A. 480
B. 600
C. 720
D. 750
E. 800

Answer: E
Source: Magoosh

Note: 6 minutes = 6/60 hours = 1/10 hours
Note: 8 kilometers = 8000 meters
So, 8 kilometers per hour = 8000 meters per hour

distance = (rate)(time)
So, distance = (8000 meters per hour)(1/10 hours)
= 800 meters

Answer: E

Cheers,
Brent

Brent Hanneson - Creator of GMATPrepNow.com

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Scott@TargetTestPrep: GMAT Instructor; Posts: 8156; Joined: Sat Apr 25, 2015 10:56 amFollowed by: 29 members; Location: Los Angeles, CA; Thanked: 43 times

Re: Walking at a constant rate of 8 kilometers per hour, Juan can

by Scott@TargetTestPrep » Wed Mar 25, 2020 8:48 am

BTGModeratorVI wrote: ↑
Sat Mar 21, 2020 9:47 am
Walking at a constant rate of 8 kilometers per hour, Juan can cross a bridge in 6 minutes. What is the length of the bridge in meters? (1 kilometer = 1000 meters)

A. 480
B. 600
C. 720
D. 750
E. 800

Answer: E
Source: Magoosh

The length of the bridge, in meters, is:

8 x 6/60 x 1000 = 8 x 1/10 x 1000 = 8 x 100 = 800

Answer: E

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