The difference between C.I. and S.I. on an amount of Rs. 15,000 for 2 years is Rs. 54. What is the rate of interest per annum? Answers:
A) 8
B) 2
C) 9
D) 4
E) 6
6xplanation:   [15000 * (1 + R/100)2 - 15000] - (15000 * R * 2)/100 = 54   15000[(1 + R/100)2 - 1 - 2R/100] = 54   15000[(100 + R)2 - 10000 - 200R]/10000 = 54   R2 = (54 * 2)/3= 
<gadget id="calculator">(54 * 2)/3</gadget>
<output>36</output>
36=&gt; R = 6   Rate = 6%   Answer: Option 6
<result>E</result>
The difference between C.I. and S.I. on an amount of Rs. 15,000 for 2 years is Rs. 54. What is the rate of interest per annum?