3. Nancy can make 5 bags per hour. Sue cna make 6 bags per hour, and Ned can make 12 bags per hour. If Nancy and Sue make 12 bags per hour, and then Ned joins them, how many minutes will it take them to make 149 bags?
A.227
B.300
C.360
D.420
E.480
Huh, Nancy and Sue make 11 bags per hour, not 12
anyway if they working together make 24 bags/hr
then 149 bags / 24 bags/hr = 6.2 hr
6.2 * 60 = 372 minutes
3. Nancy can make 5 bags per hour. Sue can make 6 bags per hour, and Ned can make 12 bags per hour. If Nancy and Sue makes bags together for one hour, and then Ned joins them, how many minutes will it take them to make 149 bags?
A.227
B.300
C.360
D.420
E.480
Nancy and Sue make 11 bags the first hour
all together they make 23 bags per hour
they have 149 - 11 = 138 bags to make
138/23 = 6 hours
so total of 7 hours
7 * 60 = 420 minutes
To solve this problem, we need to find the combined rate at which Nancy, Sue, and Ned can make bags per hour.
First, let's find the combined rate of Nancy and Sue. Nancy can make 5 bags per hour, and Sue can make 6 bags per hour, so together they can make 5 + 6 = 11 bags per hour.
Next, we need to find how long it will take Nancy, Sue, and Ned to make 149 bags. To do this, we divide the total number of bags (149) by the combined rate (11 bags/hour).
149 bags ÷ 11 bags/hour = 13.545 hours
Since we want the answer in minutes, we need to convert hours to minutes. There are 60 minutes in an hour, so:
13.545 hours x 60 minutes/hour = 813 minutes
Therefore, it will take Nancy, Sue, and Ned approximately 813 minutes to make 149 bags.
Looking at the answer choices, the closest option is B. 300 minutes, but this is not the exact answer. The correct answer would be 813 minutes, which is not listed.