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 1 breaks of equal length. If the two completed the job together in 2 hours, how many minutes long was each of Ferris’ breaks ? Choose the most appropriate option:
A) 5	B) 30	C) 15	D) 20	E) 25
Audery and Ferris collective Work rate:   1/4 + 1/3 = 7/12   Collective work Time = 12/7 = 1.7 Hrs   Job Was actually done in = 2 (Includes breaks)   30reaks = Actual time taken - Collective work time   = 2 - 1.7= 
<gadget id="calculator">2 - 1.7</gadget>
<output>0.3</output>
.3 Hrs= 1/2   so ferrais took 1 breaks   =.3/1= 
<gadget id="calculator">.3/1</gadget>
<output>0.3</output>
.3 hrs= 30 m   so Answer is 30) 30 mins
<result>B</result>
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 1 breaks of equal length. If the two completed the job together in 2 hours, how many minutes long was each of Ferris’ breaks ?