The monthly incomes of A and B are in the ratio 5 : 2. B's monthly income is 12% more than C's monthly income. If C's monthly income is Rs. 13000, then find the annual income of A? Choose the correct choice from the following answers:
A) Rs. 420000
B) Rs. 180000
C) Rs. 436800
D) Rs. 504000
E) None of these
B's monthly income = 13000 * 112/100 = Rs. 14560   B's monthly income = 2 parts ----&gt; Rs. 14560   A's monthly income = 5 parts = 5/2 * 14560 = Rs. 36400   A's annual income = Rs. 36400 * 12 = Rs. 436800   ANSWER:Rs. 436800
<result>C</result>
The monthly incomes of A and B are in the ratio 5 : 2. B's monthly income is 12% more than C's monthly income. If C's monthly income is Rs. 13000, then find the annual income of A?