The simple interest on a sum of money will be Rs.600 after 10 years. If the principal is trebled after 5 years what will be the total interest at the end of the tenth year?  Choose one:
A) 1200 B) 1227 C) 2788 D) 2767 E) 2971
P --- 10 ---- 600   P --- 5 ----- 300   3P --- 5 ----- 900   ------   =&gt; 1200   1200nswer: 1200
<result>A</result>
The simple interest on a sum of money will be Rs.600 after 10 years. If the principal is trebled after 5 years what will be the total interest at the end of the tenth year?