A wolf eats 4.5 kg of meat in 2 days. A baby tiger eats...

Expert replies

AAPL: Moderator; Posts: 2632; Joined: Sun Oct 29, 2017 2:08 pmFollowed by: 2 members

by AAPL » Tue Feb 27, 2018 3:45 pm

A wolf eats 4.5 kg of meat in 2 days. A baby tiger eats 3 kg of meat in 4 days. How much meat can the two combined eat in three days?

A. 10.
B. 9.
C. 8.
D. 7.
E. 6.

The OA is B.

wolf eats 4.5 = 9/2 kg in 2 days, that's mean, 2/(9/2) =9/4 kg/day, right?

baby tiger eats 3 kg in 4 days, that's mean, 4/3 kg/day, right?

I don't have clear this PS question. I appreciate if any expert explains it to me. Thank you so much.

Like this post

Source: Beat The GMAT — Problem Solving | Tue Feb 27, 2018 3:45 pm

GMAT/MBA Expert

[email protected]: Elite Legendary Member; Posts: 10392; Joined: Sun Jun 23, 2013 6:38 pmFollowed by: 511 members; Location: Palo Alto, CA; Thanked: 2867 times; GMAT Score:800

by [email protected] » Tue Feb 27, 2018 4:40 pm

Hi AAPL,

We're told that wolf eats 4.5 kg of meat in 2 days and a baby tiger eats 3 kg of meat in 4 days. We're asked how much meat the two combined eat in three days. The math behind this question can be done in several different ways. It's worth noting that all five answers are INTEGERS though - so if 'your way' involves a lot of 'ugly math', then it's probably not the fastest/easiest way to answer the question.

Since the two 'rates' are given in terms of 2 days and 4 days, I'm going to 'convert' the data to 4 days.

A wolf eats 4.5 kg in 2 days, so it eats 9 kg in 4 days
A baby tiger eats 3 kg in 4 days
Thus, in 4 days a total of 9+3 = 12 kg of meat is eaten

We're asked how much is eaten in 3 days. Since 3 days is 3/4 of 4 days, a total of 3/4 of 12 kg of meat will be eaten in that time:

(3/4)(12) = 9 kg

Final Answer: B

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

Contact Rich at [email protected]

Like this post

GMAT/MBA Expert

Scott@TargetTestPrep: GMAT Instructor; Posts: 8136; Joined: Sat Apr 25, 2015 10:56 amFollowed by: 29 members; Location: Los Angeles, CA; Thanked: 43 times

by Scott@TargetTestPrep » Thu Mar 01, 2018 5:41 pm

AAPL wrote:A wolf eats 4.5 kg of meat in 2 days. A baby tiger eats 3 kg of meat in 4 days. How much meat can the two combined eat in three days?

A. 10.
B. 9.
C. 8.
D. 7.
E. 6.

The total number of kilograms of meat the wolf and tiger eat per day is:

4.5/2 + 3/4 = 9/4 + 3/4 = 12/4 = 3

So in 3 days they can eat 3 x 3 = 9 kg of meat.

Answer: B

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

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

559 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 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