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Mr. Sharma lends ₹24,000 at 13% p.a. simple interest and an equal sum at 12% p.a. compound interest. Find the total interest earned by Mr. Sharma in 2 years. - Mathematics

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Question

Mr. Sharma lends ₹24,000 at 13% p.a. simple interest and an equal sum at 12% p.a. compound interest. Find the total interest earned by Mr. Sharma in 2 years.

Sum
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Solution

Sum lends (P) = ₹24000

Rate (R) = 13% p.a.

Time (T) = 2 years

In case of simple interest,

Simple interest for 2 years = `" PRT"/100`

= `₹(24000xx13xx2)/100`

= ₹6240

In the case of compound interest,

Interest for the first year = `(24000xx12xx1)/100`

= ₹2880

Amount after the first year,

= ₹24000 + 2880

= ₹26880

Interest for the second year = `₹(26880xx12xx1)/100`

= `₹322560/100`

= ₹3225.60

∴ C.I. for 2 years = ₹2880 + 3225.60

= ₹6105.60

Total interest = ₹6240 + 6105.60

= ₹12345.60

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Chapter 9: Interest - Exercise 9 (C) [Page 114]

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Selina Concise Mathematics [English] Class 8 ICSE
Chapter 9 Interest
Exercise 9 (C) | Q 15 | Page 114
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