Question

In what time will Rs. 1000 amount to Rs 13 31 at 10% per annum in compound Interest? A)rs 6218 b) Rs 5.000 c) Rs 6418 (d) Rs 22,218​

Answer 1

$\huge{\underline{\mathtt{\red{A}\pink{n}\green{S}\blue{w}\purple{E}\orange{r}\green{}\bold\red{⇝}}}}$

Given:

• Principal P=1000
• Amount A=1331
• Rate = 10%

Let the time be n years.

Therefore, 1000 $\rm{(1 + \frac{10}{100} ) ^{n} = 1331}$

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$\pink{\implies } \rm{( \frac{11}{10} )^{n} = \frac{1331}{1000} }$

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We Know, $\rm{( \frac{11}{10})^{3} = \frac{1331}{1000} }$

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On comparing powers, we get n = 3

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