Bunuel wrote:

20 workmen can make 35 widgets in 5 days. How many workmen are needed to make 105 widgets in 5 days?

(A) 7

(B) 20

(C) 25

(D) 30

(E) 60

W = # * r * t, where # = number of workers. Manipulate that equation in same way as W = rt.

Individual worker's rate is 35/(5*20), or 35/100, or \(\frac{7}{20}\)

New # of workers, using individual rate, is 105/[(7/20)*5], or 105/(35/20), or 105/(7/4) =

105 * \(\frac{4}{7}\) = 60

Answer E

_________________

In the depths of winter, I finally learned

that within me there lay an invincible summer.

-- Albert Camus, "Return to Tipasa"