Fabina borrows Rs 12,500 at 12% per annum for 3 years at simple interest and Radha borrows the same amount for the same time period at 10% per annum, compounded annually. Who pays more interest and by how much? 

Answers (1)

For Fabina,

Principal,P =Rs 12500 

Simple interest Rate,R = 12% p.a.

Time period,n = 3 years. 

\therefore Simple Interest, SI at 12% for 3 years = 3\times\frac{12500\times12}{100} = Rs 4500

For Radha,

Principal,P =Rs 12500 

Compound interest Rate,R = 10% p.a.

Time period,n = 3 years. 

We know, Amount when interest is compounded annually,

A =P(1+\frac{R}{100})^n

 A=12500(1+\frac{10}{100})^3 = Rs 16637.50

\therefore Compound \:\:Interest, CI = A - P = Rs\: (16637.50 - 12500) = Rs \:4137.50

\therefore Fabina pays more interest and Rs (4500 - 4137.50) = Rs 362.50 more.

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