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?

Question

A.227
B.300
C.360
D.420
E.480

Answer 1

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

Answer 2

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

Answer 3

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