1.  Goods were bought for Rs. 600 and sold the same for Rs. 688.50 at a credit of 9 months and thus gaining 2% The rate of interest per annum is: 

Answer: Option A Explanation:
Now, P.W. = Rs. 612 and sum = Rs. 688.50. T.D. = Rs. (688.50  612) = Rs. 76.50. Thus, S.I. on Rs. 612 for 9 months is Rs. 76.50.
