a can do a piece of work in 4 days . b can do it in 6 days . with the assistance of c they completed the work in 2 days . find in how many days can c alone do it ?
c = 1 / 2 - 1 / 4 - 1 / 6 = 1 / 12 = > 12 days answer : b
divide(multiply(4, 6), divide(subtract(multiply(4, 6), multiply(add(divide(multiply(4, 6), 4), divide(multiply(4, 6), 6)), 2)), 2))