A man take 80 days to complete a job. To complete this job, 4 men, 8 women and 4 machines take 5 days. Alternatively, 4 men, 1, women and 2 machines take 10 days to complete the job. Find the time taken by a women to complete the job (in says)

Options

A. 90
B. 100
C. 105
D. 120

Answer

D

Explanation

(i) Fram the equations as follows :
`4m+8w+4` machine `=(1)/(5) and 4m+1w+1` machine `=(1)/(10)`
(ii) Since the work done by a man in one day known, work done by women an be found.