Question

compute the compound interest on Rs 4000 for 3 years at 20% per annum

Answer 1

SOLUTION:-

Given:

•Principal,(P)= Rs.4000

•Time,(n)= 3 year's

•Rate, (R)= 20%

To find:

Compound Interest.

Explanation:

We know that, compound Interest;

C.I.= Amount - Principal.

&

$A = P( 1 + \frac{r}{100} ) {}^{n} \\ \\ = > A = 4000(1 + \frac{20}{100} ) {}^{3} \\ \\ = > A = 4000(1 + \frac{1}{5} ) {}^{3} \\ \\ = > A = 4000( \frac{5 + 1}{5} ) {}^{3} \\ \\ = > A = 4000 \times \frac{6}{5} \times \frac{6}{5} \times \frac{6}{5} \\ \\ = > A =Rs.(32 \times 36 \times 6) \\ \\ = > A = Rs.6912$

Now,

C.I.= Rs.6912 - Rs.4000

C.I.= Rs.2912

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Answer 2

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