A bucket full worns

This topic has expert replies
Moderator
Posts: 2205
Joined: Sun Oct 15, 2017 1:50 pm
Followed by:6 members

A bucket full worns

by BTGmoderatorLU » Mon May 06, 2019 7:23 pm

Timer

00:00

Your Answer

A

B

C

D

E

Global Stats

Source: Economist GMAT

A bucket full of worms kept for Mike's next fishing trip was discovered by the rat that resides in the basement. The rat eats a sixth of the total number of worms in 5 hours. How much time will it take the rat to finish a quarter of the worms?

A. 4 hours
B. 6 hours
C. 7.5 hours
D. 8 hours
E. 30 hours

The OA is C

User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pm
Location: New York, NY
Thanked: 13060 times
Followed by:1906 members
GMAT Score:790

by GMATGuruNY » Tue May 07, 2019 3:00 am
BTGmoderatorLU wrote:Source: Economist GMAT

A bucket full of worms kept for Mike's next fishing trip was discovered by the rat that resides in the basement. The rat eats a sixth of the total number of worms in 5 hours. How much time will it take the rat to finish a quarter of the worms?

A. 4 hours
B. 6 hours
C. 7.5 hours
D. 8 hours
E. 30 hours
Let the number of worms = 60.
Since the rat eats 1/6 of the 60 worms -- in other words, 10 worms -- in 5 hours, the rat's rate = w/t = 10/5 = 2 worms per hour.
1/4 of the 60 worms = 60/4 = 15 worms.
Since the rat's rate = 2 worms per hour, the time for the rat to eat 15 worms = w/r = 15/2 = 7.5 hours.

The correct answer is C.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 7223
Joined: Sat Apr 25, 2015 10:56 am
Location: Los Angeles, CA
Thanked: 43 times
Followed by:29 members

by Scott@TargetTestPrep » Thu May 09, 2019 5:09 pm
BTGmoderatorLU wrote:Source: Economist GMAT

A bucket full of worms kept for Mike's next fishing trip was discovered by the rat that resides in the basement. The rat eats a sixth of the total number of worms in 5 hours. How much time will it take the rat to finish a quarter of the worms?

A. 4 hours
B. 6 hours
C. 7.5 hours
D. 8 hours
E. 30 hours

The OA is C
We can create the proportion:

(1/6)/5 = (1/4)/n

1/30 = 1/4n

4n = 30

n = 7.5

Answer: C

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