a man took loan from a bank at the rate of 12 % p . a . s . i . after 20 years he had to pay rs . 2100 interest only for the period . the principal amount borrowed by him was ?
"principal = ( 100 * 2100 ) / ( 12 * 20 ) = rs . 875 answer : d"
divide(divide(multiply(2100, const_100), 20), 12)