3 men and 7 women can do a Job In 5 days, while 4 men and 6 women can do it in 4 days. The number of days required for a group of 10 women working together, at the same rate as before, to finish the same job is :

3 men and 7 women can do a Job In 5 days, while 4 men and 6 women can do it in 4 days. The number of days required for a group of 10 women working together, at the same rate as before, to finish the same job is :
1). 30 days
2). 36 days
3). 40 days
4). 20 days

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