The compound interest earned by Sunil on a certain amount at the end of two years at the rate of 4% p.a. was Rs.326.40. Find the total amount that Sunil got back at the end of two years in the form of principal plus interest earned.
Choose the correct choice from the following choices:  A) Rs.4326.40  B) Rs.4236.40  C) Rs.4136.40  D) Rs.4316.40  E) Rs.4136.40
Let the sum be Rs.P   P{ [ 1 + 4/100]2 - 1 } = 326.40   P(4/100)(2 + 4/100) = 326.40 [a2 - b2 = (a - b) ( a + b)] P = 326.40 / (0.04)(2.04) = 4000 Rs.4326.40mount =4000+326.40= 
<gadget id="calculator">4000+326.40</gadget>
<output>4_326.4</output>
4326.40 Rs.4326.40nswer : Rs.4326.40
<result>A</result>
The compound interest earned by Sunil on a certain amount at the end of two years at the rate of 4% p.a. was Rs.326.40. Find the total amount that Sunil got back at the end of two years in the form of principal plus interest earned.