a reduction of 30 % in the price of salt enables a lady to obtain 10 kgs more for rs . 100 , find the original price per kg ?
"100 * ( 30 / 100 ) = 30 - - - 10 ? - - - 1 = > rs . 3 100 - - - 70 ? - - - 3 = > rs . 4.3 answer : e"
multiply(divide(divide(multiply(divide(30, const_100), 100), 10), multiply(divide(30, const_100), 100)), const_100)