The simple interest on a sum of money will be Rs.500 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 answer
A) 2261  B) 2888  C) 1200  D) 2699  E) 900
P --- 10 ---- 500   P --- 5 ----- 250   3P --- 5 ----- 750   ------   =&gt; 900   Answer: 900
<result>E</result>
The simple interest on a sum of money will be Rs.500 after 10 years. If the principal is trebled after 5 years what will be the total interest at the end of the tenth year?