the simple interest on a sum of money will be rs . 500 after 10 years . if the principal is trebled after 5 years what will be the total interest at the end of the tenth year ?
"p - - - 10 - - - - 500 p - - - 5 - - - - - 250 3 p - - - 5 - - - - - 750 - - - - - - = > 900 answer : e"
add(multiply(multiply(divide(500, 10), 5), const_3), multiply(divide(500, 10), 5))