a can do a work in 15 days b in 14 days and c in 16 days . if they work on it together then in how many days required to complete the work ?
person ( a ) ( b ) ( c ) ( a + b + c ) time - ( 15 ) ( 14 ) ( 16 ) rate - ( 224 ) ( 240 ) ( 210 ) ( 674 ) work - ( 3360 ) ( 3360 ) ( 3360 ) ( 3360 ) therefore a + b + c requires ( 3360 / 674 ) days to complete entire work = 3360 / 674 answer is c
divide(multiply(multiply(15, 14), 16), multiply(add(add(15, 14), 16), 15))