a sum of money is put out at compound interest for 2 years at 20 % . it would fetch rs . 964 more if the interest were payable half - yearly , then it were pay able yearly . find the sum .
"p ( 11 / 10 ) ^ 4 - p ( 6 / 5 ) ^ 2 = 964 p = 40000 answer : d"
add(multiply(add(20, const_1), add(20, const_1)), add(20, const_1))