what sum of money will produce rs . 90 as simple interest in 4 years at 4 1 / 2 percent ?
"explanation : 90 = ( p * 4 * 9 / 2 ) / 100 90 = 36 p / 100 p = 500 answer : option d"
divide(90, divide(multiply(4, add(4, divide(1, 2))), const_100))