42 women can do a piece of work in 18 days. How many women would be required to do the same work in 21 days ?

A. 36
B. 24
C. 30
D. 44

42 women can do a piece of work in 18 days. How many women would be required to do the same work in 21 days ?

Let X be the number of women required to finish the work in 21 days.

Now, using Work Equivalence Method:

42 × 18 = X × 21

X = 36.

Number of women required = 36