The simple interest on a sum of money will be Rs.800 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 the correct choice from the following answers: A) 8981 B) 3799 C) 1200 D) 1600 E) 1732
P --- 10 ---- 800   P --- 5 ----- 400   3P --- 5 ----- 1200   ------   =&gt; 1600   Answer: 1600
<result>D</result>
The simple interest on a sum of money will be Rs.800 after 10 years. If the principal is trebled after 5 years what will be the total interest at the end of the tenth year?