A sum of Rs.4500 is invested at a compound interest for three years, the rate of interest being 10% p.a., 20% p.a. and 25% p.a. for the 1st, 2nd and the 3rd years respectively. Find the interest received at the end of the three years.  Choose the most appropriate option.
A) Rs.2925 B) Rs.3120 C) Rs.3320 D) Rs.2760 E) None of these
Let A be the amount received at the end of the three years.   Rs.2925 = 4500[1 + 10/100][1 + 20/100][1 + 25/100]   Rs.2925 = (4500 * 11 * 6 * 5)/(10 * 5 * 4)   Rs.2925 = Rs.7425   So the interest = 7425 - 4500 = Rs.2925   Rs.2925NSWER:Rs.2925
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A sum of Rs.4500 is invested at a compound interest for three years, the rate of interest being 10% p.a., 20% p.a. and 25% p.a. for the 1st, 2nd and the 3rd years respectively. Find the interest received at the end of the three years.