The difference between C.I. and S.I. on an amount of Rs. 15,000 for 2 years is Rs. 216. What is the rate of interest per annum?	Pick one:
A) 8  B) 2  C) 9  D) 4  E) 12
12xplanation:   [15000 * (1 + R/100)2 - 15000] - (15000 * R * 2)/100 = 216   15000[(1 + R/100)2 - 1 - 2R/100] = 216   15000[(100 + R)2 - 10000 - 200R]/10000 = 216   R2 = (216 * 2)/3= 
<gadget id="calculator">(216 * 2)/3</gadget>
<output>144</output>
144=&gt; R = 12   Rate = 12%   Answer: Option 12
<result>E</result>
The difference between C.I. and S.I. on an amount of Rs. 15,000 for 2 years is Rs. 216. What is the rate of interest per annum?