8 identical machines, working alone and at their constant rates, take 6 hours to complete a job lot. How long would it take for 5 such machines to perform the same job?
Choose the correct choice from the following answers.
A) 2.25 hours
B) 8.75 hours
C) 12 hours
D) 14.25 hours
E) 9.6 hours
Let each machine do 1 unit of work for 1 hour   8 machines --&gt; 8 units of work in 1 hour   For 6 hours = 8*6= 
<gadget id="calculator">8*6</gadget>
<output>48</output>
48 Units of total work is done.   Now this 48 Units of total work must be done by 5 machines   5 units of work(5 machines) ---&gt; 1 hour   for 48 Units of work   5*9.6 ---&gt; 1*9.6 hours   9.6 hours 9.6 hours
<result>E</result>
8 identical machines, working alone and at their constant rates, take 6 hours to complete a job lot. How long would it take for 5 such machines to perform the same job?