Discussion
The compound interest earned by Sunil on a certain amount at the end of two years at the rate of 8% p.a. was Rs.2828.80. Find the total amount that Sunil got back at the end of two years in the form of principal plus interest earned.
Answer: B
Let the sum be Rs.P
P{ [ 1 + 8/100]² - 1 } = 2828.80
P(8/100)(2 + 8/100) = 2828.80 [a² - b² = (a - b) ( a + b)] P = 2828.80 / (0.08)(2.08) = 1360/0.08 = 17000 Principal + Interest = Rs. 19828.80
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