Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized for You
we will pick new questions that match your level based on your Timer History
Track Your Progress
every week, we’ll send you an estimated GRE score based on your performance
Practice Pays
we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Your score will improve and your results will be more realistic
Is there something wrong with our timer?Let us know!
Jack is putting together gift boxes at a rate of 3 per hour in the fir
[#permalink]
24 Feb 2023, 06:38
Expert Reply
1
Bookmarks
00:00
Question Stats:
81% (01:33) correct
18% (03:23) wrong based on 11 sessions
HideShow
timer Statistics
Jack is putting together gift boxes at a rate of 3 per hour in the first hour. Then Jill comes over and yells, “Work faster!” Jack, now nervous, works at the rate of only 2 gift boxes per hour for the next 2 hours. Then Alexandra comes to Jack and whispers, “The steadiest hand is capable of the divine.” Jack, calmer, then puts together 5 gift boxes in the fourth hour. What is the average rate at which Jack puts together gift boxes over the entire period?
Jack is putting together gift boxes at a rate of 3 per hour in the fir
[#permalink]
25 Mar 2023, 10:02
Expert Reply
OE
The average rate is equal to the total work done divided by the time in which the work was done. Remember that you cannot simply average the rates. You must find the total work and total time. The total time is 4 hours. To find the total work, add up the boxes Jack put together in each hour: 3 + 2 + 2 + 5 = 12. Therefore, the average rate is
12/4
or 3 boxes per hour.
gmatclubot
Jack is putting together gift boxes at a rate of 3 per hour in the fir [#permalink]