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Jack is putting together gift boxes at a rate of 3 per hour in the fir
[#permalink]
24 Feb 2023, 06:38
24 Feb 2023, 06:38
Expert Reply
1
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Question Stats:
83% (01:27) correct
16% (03:23) wrong based on 12 sessions
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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?
Show: ::
3 boxes
Jack is putting together gift boxes at a rate of 3 per hour in the fir
[#permalink]
25 Mar 2023, 10:02
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.
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]
25 Mar 2023, 10:02
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