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Jemma takes 2 hours to swim the 4 miles from buoy A to buoy B. Tired from her swim, she then continues

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by AAPL » Wed May 27, 2020 3:43 am
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Economist GMAT

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

OA C
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Re: Jemma takes 2 hours to swim the 4 miles from buoy A to buoy B. Tired from her swim, she then continues

by Jay@ManhattanReview » Wed May 27, 2020 5:00 am
AAPL wrote: ↑
Wed May 27, 2020 3:43 am
 Economist GMAT

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

OA C
Given the information, Jemma's speed from A to B = 4/2 = 2 mph;

thus, her speed from B to C = 1/2 of 2 = 1mph

Time taken to reach C from B = 6*1 = 6 hours

The correct answer: C

Hope this helps!

-Jay
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Re: Jemma takes 2 hours to swim the 4 miles from buoy A to buoy B. Tired from her swim, she then continues

by Scott@TargetTestPrep » Sun May 31, 2020 4:06 am
AAPL wrote: ↑
Wed May 27, 2020 3:43 am
 Economist GMAT

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

OA C
Solution:

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

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