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 ?	Answers
A) Rs. 600 B) Rs. 900 C) Rs. 1200 D) Rs. 1500 E) None
Solution   22.22   Let the sum be Rs. x. Now, S.I. = Rs. 600,T = 10 years.   Rate = % = (100x600/X x 10)% =(6000/X)%   S.I. for first 5 years = Rs.(X x 5 x 6000/X x 100) = Rs. 300.   S.I. for first 5 years = Rs. (3X x 5 x 6000/X x 100)= Rs. 900.   ∴ Total interest = Rs. 1200.   Answer Rs. 1200
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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 ?