A certain sum amounts to Rs.2250 in 5 years and Rs.2550 in 7 years. Find the rate % per annum?	Answers.
A) 10%  B) 11%  C) 9%  D) 8%  E) 7%
5 --- 2250   7 --- 2550   --------------   2 --- 300   N = 1 I = 150 R = ?   P = 2250 - 750= 
<gadget id="calculator">2250 - 750</gadget>
<output>1_500</output>
1500   150= (1500*1*R)/100   R = 10%   10%nswer: 10%
<result>A</result>
A certain sum amounts to Rs.2250 in 5 years and Rs.2550 in 7 years. Find the rate % per annum?