Question
Priya lent Rs. 10,000 to her colleague at a compound
interest rate of 'a%' per annum, compounded annually. A year later, the colleague paid back Rs. 10,800. Had the loan been at simple interest of (a + 3)% instead, what would have been the interest earned?Solution
ATQ, Find the rate 'a': 
Calculate the simple interest: 
The interest earned would have been Rs. 1100.
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