in what ratio must rice of rs . 30 per kg be mixed with rice of rs . 56 per kg so that cost of mixture is rs . 35 per kg ?
"( 35 - 56 ) / ( 30 - 35 ) = 6 / 2 = 21 : 5 answer : e"
divide(divide(subtract(35, 56), subtract(30, 56)), subtract(const_1, divide(subtract(35, 56), subtract(30, 56))))