32 persons working 10 hours a day can do 3 units of work in 18 days. How many persons are required to do 5 units of that work in 16 days, if they work 6 hours per day?

50 55 60 45

60

\(\frac{M_1×D_1×H_1}{M_2×D_2×H_2}\) = \(\frac{W_2}{W_1}\) ⇒ \(\frac{32×18×10}{M_2×16×6}\) = \(\frac{5}{3}\) ⇒ M2 = 36