In the given problem there are several information's worth taking note of. Based on these information's the rate on the loan can be calculated.It is already given that the Principal amount is $112000. Time is given as 30 years and the final amount as $176400. Now we have to find the amount of interest first Interest amount = (176400 - 112000) dollars = 64400 dollars As per the formula of simple interest we know that Interest = Principal * Rate of interest * Time Rate of Interest = (Principal * Time)/Interest amount = (112000 * 30)/64400 = 3360000/64400 = 52.17 So the rate of interest on the loan for the period of 30 years was 52.17%
