Jemma takes 2 hours to swim the 4 miles from buoy A to

Expert replies

Previous Topic Next Topic

swerve: Legendary Member; Posts: 2604; Joined: Sun Oct 29, 2017 2:04 pmFollowed by: 6 members

by swerve » Fri May 18, 2018 10:13 am

Timer

00:00

Your answer

Difficulty–

right wrong

Pick an answer to see how members did

Jemma takes 2 hours to swim the 4 miles from buoy A to buoy B. Tired from her swim, she then continues to buoy C at half her previous speed. If buoy C is 6 miles away from buoy B, how many more hours will pass before Jemma reaches Buoy C?

A. 4
B. 5
C. 6
D. 7
E. 8

The OA is C.

Please, can anyone explain this PS question? I can't get the correct answer. I need help. Thanks.

Source: Beat The GMAT — Problem Solving | Fri May 18, 2018 10:13 am

GMAT/MBA Expert

[email protected]: Elite Legendary Member; Posts: 10391; Joined: Sun Jun 23, 2013 6:38 pmFollowed by: 511 members; Location: Palo Alto, CA; Thanked: 2867 times; GMAT Score:800

by [email protected] » Fri May 18, 2018 10:17 am

Hi swerve,

We're told that Jemma takes 2 hours to swim the 4 miles from buoy A to buoy B and then continues to buoy C at HALF her previous speed. If buoy C is 6 miles away from buoy B, we're asked how many MORE hours will pass before Jemma reaches Buoy C. This question is just a 'Rate' question - and you can solve it with some basic Arithmetic.

Since Jemma took 2 hours to swim the first 4 miles, she swam at 2 miles/hour. We're told that this rate is then cut in HALF for the next part of her swim - so she is then swimming at 1 mile/hour. Over the course of the next 6 miles at THAT speed, she would need 6 hours to swim that distance.

Final Answer: C

GMAT assassins aren't born, they're made,
Rich

Contact Rich at [email protected]

GMAT/MBA Expert

Scott@TargetTestPrep: GMAT Instructor; Posts: 8246; Joined: Sat Apr 25, 2015 10:56 amFollowed by: 29 members; Location: Los Angeles, CA; Thanked: 43 times

by Scott@TargetTestPrep » Tue May 22, 2018 5:18 pm

swerve wrote:Jemma takes 2 hours to swim the 4 miles from buoy A to buoy B. Tired from her swim, she then continues to buoy C at half her previous speed. If buoy C is 6 miles away from buoy B, how many more hours will pass before Jemma reaches Buoy C?

A. 4
B. 5
C. 6
D. 7
E. 8

Jemma’s initial speed, from A to B, is 2 mph. Her speed from B to C is 1 mph, so it takes her 6 hours to swim to buoy C.

Answer: C

Scott Woodbury-Stewart
Founder and CEO
[email protected]

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

Featured schoolRound 2 closes Jan 7, 2027 53 days left

Chicago Booth

Since 1982, 10 Booth faculty members have received the Nobel Prize in Economic Sciences, more than any other business school.

#3
U.S. News rank: $175,000
Median base salary: 670
Average GMAT Focus: 635
Students in the class

Apply to Booth Visit chicagobooth.edu See the full profile

Photo: Warren LeMay, CC BY-SA 2.0

GMAT Course Reviews

563 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (563 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review