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Find the Amount and the Compound Interest Payable Annually on the Following : Rs.24000 for 1 1 2 Years at 7 1 2 % per Annum. Hint : 1 Year 146 Days = 1 146 365 Year = 1 2 5 Year - Mathematics

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Question

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

Rs.24000 for 1`(1)/(2)` years at 7`(1)/(2)`% per annum.

[Hint : 1 year 146 days = `1(146)/(365)"year" = 1(2)/(5)"year"`]

Sum
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Solution

Rs.24000 for 1`(1)/(2)`years at 7`(1)/(2)`% per annum.
Here P = Rs.24000 , t = 1`(1)/(2)` years, r = 7`(1)/(2)`% = `(15)/(2)`%
Now, Amount after 1 year
= `"P"(1 + "r"/100)`

= `24000(1 + 15/(2 xx100))`

= `24000(1 + 3/40)`

= `24000(43/40)`
= 25800
Thus, principle for the next 6 months = Rs.25800
Interest for the next 6 months
= `(25800 xx 15 xx 6)/(200 xx 12)`
= 967.50
Therefore, amount after 1`(1)/(2)`years
= Rs.25800 + Rs.967.50
= Rs.26767.50
And CI
= A - P
= Rs.26767.50 - Rs.24000
= Rs.2767.50.

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Concept of Compound Interest - When the Interest is Compounded Half Yearly
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Chapter 3: Compound Interest - Exercise 3.1

APPEARS IN

Frank Mathematics [English] Class 9 ICSE
Chapter 3 Compound Interest
Exercise 3.1 | Q 1.4

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