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Find the Amount and the Compound Interest Payable Annually on the Following : Rs.32000 for 2 Years at 7 1 2 % per Annum. - Mathematics

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Question

Find the amount and the compound interest payable annually on the following :

Rs.32000 for 2 years at 7`(1)/(2)`% per annum.

Sum
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Solution

Rs.32000 for 2 years at 7`(1)/(2)`% per annum.
Here P1 = Rs.32000 and r = 7`(1)/(2)`% = `(15)/(2)`%
So, Amount after 1 year
= `"P"(1 + "r"/100)`

= `32000(1 + 15/(2 xx 100))`

= `32000(1 + 3/40)`

= `32000(43/40)`
= 34400
Thus, P2 = Rs.34400 and r = `(15)/(2)`%
So, Amount after 2 year
= `"P"(1 + "r"/100)`

= `34400(1 + 15/(2 xx 100))`

= `34400(1 + 3/40)`

= `34400(43/40)`
= 36980
Hence, Amount = Rs.36980
Also, CI
= A - P
= Rs.36980 - Rs.32000
= Rs.4980.

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Concept of Compound Interest - Inverse Formula
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Chapter 3: Compound Interest - Exercise 3.1

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Frank Mathematics [English] Class 9 ICSE
Chapter 3 Compound Interest
Exercise 3.1 | Q 1.2
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