a can do a piece of work in 6 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 / 6 - 1 / 6 = 1 / 6 = > 6 days answer : c"
divide(multiply(6, 6), divide(subtract(multiply(6, 6), multiply(add(divide(multiply(6, 6), 6), divide(multiply(6, 6), 6)), 2)), 2))