A group of men can complete a job in X hours. After every 4 hours, half the number of men working at that point of time leave the job. Continuing this way if the job is finished in 16 hours, what is the value of X.	Select the correct option: A) 5.5 days B) 6.5 days C) 7.5 days D) 8.5 days E) 9.5 days
If there are m men   job requires mX man hours.   job completed in first 4 hrs = m*4 =4m   job completed in next 4 hrs = 4*m/2 = 2m   job completed in next 4 hrs = 4.m/4 = m   job completed in last 4 hrs = 4.m/8= m/2   4m+2m+m+m/2 = mX   x= 7+1/2= 
<gadget id="calculator">7+1/2</gadget>
<output>15/2 = around 7.5</output>
7.5 days   ANSWER:7.5 days
<result>C</result>
A group of men can complete a job in X hours. After every 4 hours, half the number of men working at that point of time leave the job. Continuing this way if the job is finished in 16 hours, what is the value of X.