Question

If 10 men or 20 women or 40 children can do a piece of work in 7 months, then 5 men, 5 women and 5 children together can do half of the work in ? 

(a) 6 months 

(b) 4 months 

(c) 5 months 

(d) 8 months

Answer 1

Correct option (d) 8 months

Explanation:

10 men = 20 women = 40 children 

(efficiency of men, women and children will be in calculated by this ratio. As they complete work in same days) 

Convert them in one figure: 10 men 

= 20 Women

Alternate:-