a , b , c can complete a piece of work in 16 , 6,12 days . working together , they complete the same work in how many days ?
a + b + c 1 day work = 1 / 16 + 1 / 6 + 1 / 12 = 15 / 48 a , b , c together will complete the job in 48 / 15 days answer is b
divide(const_1, add(add(divide(const_1, 16), divide(const_1, add(const_4, const_2))), divide(const_1, multiply(const_2, add(const_4, const_2)))))