Audrey 4 hours to complete a certain job. Ferris can do the same job in 3hours. Audrey and Ferris decided to collaborate on the job, working at their respective rates. While Audrey worked continuously, Ferris took 3 breaks of equal length. If the two completed the job together in 2 hours, how many minutes long was each of Ferris breaks ?
a) 5
b) 10
c) 15
d) 20
e) 25
a) 5
b) 10
c) 15
d) 20
e) 25