20 men can complete a work in 14 days and 20 women can complete the same work in 18 days 8 men start......

20 men can complete a work in 14 days and 20 women can complete the same work in 18 days. 8 men start the work and after working for 21 days, they are replaced by x women. If the remaining work is to be completed by x women in 9 days, then how many women should be employed? 

Explanation: 
20M *14=20W*18
M/W=9/7
Total Work=20*9*14=2520
8 men work in 21 days=8*9*21=1512
remaining Work=2520-1512=1008
x *7*9=1008
x=16 women 

By: Manpreet kaur