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# What Sum Will Amount to Rs 4913 in 18 Months, If the Rate of Interest is 12 1 2 % per Annum, Compounded Half-yearly? - Mathematics

Course
ConceptRate Compounded Annually Or Half Yearly (Semi Annually)

#### Question

What sum will amount to Rs 4913 in 18 months, if the rate of interest is $12\frac{1}{2} \%$ per annum, compounded half-yearly?

#### Solution

Let the sum be Rs x.
Given:
A = Rs 4913
R = 12 . 5 %
n = 18 months = 1 . 5 years
We know that:
$A = P \left( 1 + \frac{R}{200} \right)^{2n}$
$4, 913 = P \left( 1 + \frac{R}{200} \right)^{2n}$
$4, 913 = x \left( 1 + \frac{12 . 5}{200} \right)^3$
$4, 913 = x\left[ \left( 1 . 0625 \right)^3 \right]$
$x = \frac{4, 913}{1 . 1995}$
$= 4, 096$
Thus, the required sum is Rs 4, 096 .

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Solution What Sum Will Amount to Rs 4913 in 18 Months, If the Rate of Interest is 12 1 2 % per Annum, Compounded Half-yearly? Concept: Rate Compounded Annually Or Half Yearly (Semi Annually).
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