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Find the Difference Between Compound Interest and Simple Interest on Rs12,000 and in 11/2 Years at 10% Compounded Yearly. - Mathematics

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Question

Find the difference between compound interest and simple interest on Rs.12,000 and in  `1 1/2` years at 10% compounded yearly.

Sum

Solution

Given: P = Rs. 12,000;  n =  `1 1/2` years and r = 10%

S.I. = `[ P xx R xx T ]/100 = [ 12,000 xx 10 xx 3/2 ]/100 = Rs. 1,800`

To Calculate C.I. annually
P = Rs. 12,000; n = 1 year and r = 10%

A = `"P"( 1 + r/100)^n  (1 + r/200)^(1/2xx2)`

= `12,000( 1 + 10/100 ) (1 + 10/200)`  

= `12000 xx 11/10 xx 21/20`

= 660 × 21

= Rs. 13,860`

C.I = 13860 - 12000

 = 1860

So Difference between C.I and C.I

C.I - S.I

= 1860 - 1800

₹60

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Concept of Compound Interest - When the Interest is Compounded Half Yearly
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Chapter 3: Compound Interest (Using Formula) - Exercise 3 (C) [Page 50]

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Selina Concise Mathematics [English] Class 9 ICSE
Chapter 3 Compound Interest (Using Formula)
Exercise 3 (C) | Q 9 | Page 50

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