On Monday Elton arrived at the recording studio at 8:00 am, and left at noon (12:00 pm), after he had finished recording 5959 of his new album. On Tuesday he arrived at 8:10 am, and left after he had completed recording the entire album, while working at the same rate as the day before. At what time did Elton leave the recording studio on Tuesday?
A. 11:12 am
B. 11:22 am
C. 11:30 am
D. 3:12 pm
E. 3:22 pm
The OA is B.
I don't understand how to solve this PS question. Experts, may you explain this to me?
5-Day Free Trial
5-day free, full-access trial TTP
Available with Beat the GMAT members only code
MORE DETAILS
On Monday Elton arrived at the recording studio at 8:00 am,
This topic has expert replies
GMAT/MBA Expert
-
[email protected]
- Elite Legendary Member
- Posts: 10392
- Joined: Sun Jun 23, 2013 6:38 pm
- Location: Palo Alto, CA
- Thanked: 2867 times
- Followed by:511 members
- GMAT Score:800
Hi M7MBA,
We're told that Elton arrived on Monday at the recording studio at 8:00 am and left at noon (12:00 pm), after he had finished recording 5/9 of his new album. On Tuesday, he arrived at 8:10 am, and left after he had completed recording the rest of the album, while working at the same rate as the day before. We're asked to find the time that Elton left the recording studio on Tuesday.
Since we know it took 4 hours to record 5/9 of the album, we can set up a ratio to determine how long it took to record the remaining 4/9 of the album:
(4)/(5/9) = (X)/(4/9)
16/9 = 5X/9
16 = 5X
X = 3 1/5 hours = 3 hours 12 minutes
Since Elton began recording on Tuesday at 8:10am, he finished at 11:22am.
Final Answer: B
GMAT assassins aren't born, they're made,
Rich
We're told that Elton arrived on Monday at the recording studio at 8:00 am and left at noon (12:00 pm), after he had finished recording 5/9 of his new album. On Tuesday, he arrived at 8:10 am, and left after he had completed recording the rest of the album, while working at the same rate as the day before. We're asked to find the time that Elton left the recording studio on Tuesday.
Since we know it took 4 hours to record 5/9 of the album, we can set up a ratio to determine how long it took to record the remaining 4/9 of the album:
(4)/(5/9) = (X)/(4/9)
16/9 = 5X/9
16 = 5X
X = 3 1/5 hours = 3 hours 12 minutes
Since Elton began recording on Tuesday at 8:10am, he finished at 11:22am.
Final Answer: B
GMAT assassins aren't born, they're made,
Rich
GMAT/MBA Expert
-
Scott@TargetTestPrep
- GMAT Instructor
- Posts: 7249
- Joined: Sat Apr 25, 2015 10:56 am
- Location: Los Angeles, CA
- Thanked: 43 times
- Followed by:29 members
We can create a proportion in which we let n = the time to complete the album:M7MBA wrote:On Monday Elton arrived at the recording studio at 8:00 am, and left at noon (12:00 pm), after he had finished recording 5959 of his new album. On Tuesday he arrived at 8:10 am, and left after he had completed recording the entire album, while working at the same rate as the day before. At what time did Elton leave the recording studio on Tuesday?
A. 11:12 am
B. 11:22 am
C. 11:30 am
D. 3:12 pm
E. 3:22 pm
(5/9)/4 = (4/9)/n
5/36 = 4/(9n)
45n = 144
n = 144/45 = 16/5 = 3 1/5 hours = 3 hours and 12 minutes
Since he arrived at 8:10 am on Tuesday, he left at 11:22 am.
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
