 
 <translate> A's 1 hour work = 1/3;
(B + C)'s 1 hour work = 1/2;
(A + B)'s 1 hour work = 1/2
(A + B + C)'s 1 hour work = (1/3 + 1/2) = 5/6
C's 1 hour work = (5/6 - 1/2) = 1/3
C alone will take 3 hours to do the work. <ibo> A's 1 hour ọrụ = 1/3; (B + C) na-arụ ọrụ otu awa = 1/2; (A + B) 1 hour ọrụ = 1/2 (A + B + C) na-arụ ọrụ otu awa = (1/3 + 1/2) = 5/6 C's 1 hour ọrụ = (5/6 - 1/2) = 1/3 Naanị C ga-ewe awa atọ ịrụ ọrụ ahụ. 