Source: Magoosh
Jason can stack two shelves in 3 hours and Maria can stack three shelves in 2 hours. How long will it take them together, working at a constant rate, to stack thirteen shelves?
A. 5 hours
B. 6 hours
C. 6.5 hours
D. 11 hours
E. 12 hours
The OA is B
5-Day Free Trial
5-day free, full-access trial TTP
Available with Beat the GMAT members only code
MORE DETAILS
Jason can stack two shelves in 3 hours and Maria can stack three shelves in 2 hours. How long will it take them...
This topic has expert replies
-
BTGmoderatorLU
- Moderator
- Posts: 2218
- Joined: Sun Oct 15, 2017 1:50 pm
- Followed by:6 members
Timer
00:00
Your Answer
A
B
C
D
E
Global Stats
-
dollydevashryee
- Junior | Next Rank: 30 Posts
- Posts: 11
- Joined: Wed Jul 22, 2020 9:27 am
If Maria can stack 3 shelves in 2 hours, she can stack 4.5 shelves in 3 hours. In 3 hours, Jason and Maria can stack 6.5 shelves total. Therefore, it would take them 6 hours to stack 13 shelves. -> B
GMAT/MBA Expert
-
Scott@TargetTestPrep
- GMAT Instructor
- Posts: 7275
- Joined: Sat Apr 25, 2015 10:56 am
- Location: Los Angeles, CA
- Thanked: 43 times
- Followed by:29 members
Solution:BTGmoderatorLU wrote: ↑Fri Sep 11, 2020 5:38 amSource: Magoosh
Jason can stack two shelves in 3 hours and Maria can stack three shelves in 2 hours. How long will it take them together, working at a constant rate, to stack thirteen shelves?
A. 5 hours
B. 6 hours
C. 6.5 hours
D. 11 hours
E. 12 hours
The OA is B
The combined rate of Jason and Maria is 2/3 + 3/2 = 4/6 + 9/6 = 13/6.
Thus, it takes them 13/(13/6) = 13 x 6/13 = 6 hours to stack 13 shelves.
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
