simple interest on a certain sum of money for 4 years at 10 % per annum is half the compound interest on rs . 3000 for 3 years at 12 % per annum . the sum placed on simple interest is
"solution c . i . = rs [ 3000 x ( 1 + 12 / 100 ) 3 - 3000 ] rs . ( 3000 x 112 / 100 x 112 / 100 x 112 / 100 - 3000 ) = rs . 1214.78 . sum = rs . [ 607.39 x 100 / 4 x 10 ] = rs . 1518.48 . answer d"
divide(multiply(divide(divide(add(divide(multiply(3000, 12), const_100), divide(multiply(add(3000, divide(multiply(3000, 12), const_100)), 12), const_100)), 3), 4), const_100), 10)