If 12 men can complete a work in 18 days, in how many days will 9 men complete the same work?

Irza Afzad Arithmetic/ Basic Math, css, Full List, Mathematics

A. 20
B. 22
C. 24
D. 30

Solution:
Work ∝ Men × Days
12 × 18 = 9 × x
x = (12 × 18) / 9 = 24
Answer: C