Vishal invested Rs. 3750 at 20% p.a. simple interest for 3 years. After 3 years, he invested the amount received by him at the 20% p.a. compound interest, compounded annually for another 2 years. Find the final amount received by Vishal at the end of 5 years.
Amount received by Vishal after 3 years of investment = (3750 × 20 × 3)/100 + 3750 = Rs. 6000 Therefore, sum invested by Vishal at compound interest = Rs. 6000 Amount received by Vishal at the end of 5 years = 6000(1 + 0.2)2 = Rs. 8640
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