a and b can do a piece of work in 3 days , b and c in 4 days , c and a in 6 days . how long will c take to do it ?
"2 c = ¼ + 1 / 6 – 1 / 3 = 1 / 12 c = 1 / 24 = > 24 days answer : c"
divide(multiply(3, const_3), subtract(divide(add(divide(multiply(3, const_3), 6), add(divide(multiply(3, const_3), 3), divide(multiply(3, const_3), 4))), const_2), divide(multiply(3, const_3), 3)))