Question

A man invested 1,000 for three years at 11% simple interest per annum and
1,000 at 10% compound interest per annum compounded annually for three
years. Find which investment is better.

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Answer 1

Interest for a year = 390/3 = 130

Let interest rate is x

As per given problem

1000*X/100 + 1500*(x+2)/100 = 130

10X + 15X + 30 = 130

25X = 100

X = 4

Answer 2

This is your answer mate