a money lender lent rs . 1000 at 3 % per year and rs . 1200 at 5 % per year . the amount should be returned to him when the total interest comes to rs . 350 . find the number of years .
( 1000 xtx 3 / 100 ) + ( 1200 xtx 5 / 100 ) = 350 â † ’ t = 3.88 answer c
divide(350, add(divide(multiply(3, 1000), const_100), divide(multiply(1200, 5), const_100)))