30.10 men and 15 women together can complete a work in 6 days. It takes 100 days for one man alone to complete the same work. How many days will be required for one woman alone to complete the same work?
A. 90 B. 145
C. 150 D. 225
Answer:
1 man's 1 day's work = 1/100.
10 men + 15 women)'s 1 day's work = 1/6
15 women's 1 day's work, = (1/6-10/100)
=(1/6-1/10)
= 1/15.
1 woman's 1 day's work = 1/225.
1 woman alone can complete the work in 225 days.
