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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? - Mathematics

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Question

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?

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Solution

Interest paid by Fabina = `"P x  R x T"/100`

= Rs `((12500xx12xx3)/100)` =  Rs4500

Amount paid by Radha at the end of 3 years = A = `P(1 + R/100)^n`

A = Rs `[12500(1 + 10/100)^3]`

= Rs `(12500xx 110/100xx110/100xx110/100) = Rs 16637.50`

C.I. = A − P = Rs 16637.50 − Rs 12500 = Rs 4,137.50

The interest paid by Fabina is Rs 4,500 and by Radha is Rs 4,137.50.

Thus, Fabina pays more interest.

Rs 4500 − Rs 4137.50 = Rs 362.50

Hence, Fabina will have to pay Rs 362.50 more.

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Chapter 8: Comparing Quantities - Exercise 8.3 [Page 134]

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NCERT Mathematics [English] Class 8
Chapter 8 Comparing Quantities
Exercise 8.3 | Q 3 | Page 134

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