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The interest earned on Rs. 15000 in 3 years at simple interest is Rs. 5400. Find the rate of interest per annum.

111.5%
212%
312.5%
415%

Answer:- 1

Explanation:-

Solution:

\begin{aligned} Rate = \frac{S .I . \times 100}{Principal \times Time} \\ = \frac{5400 \times 100}{15000 \times 3} \\ = 12 % Per annum . \end{aligned}

$\eqalign{ & {\text{Rate}} = \frac{{{\text{S}}{\text{.I}}{\text{.}} \times {\text{100}}}}{{{\text{Principal}} \times {\text{Time}}}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\, = \frac{{5400 \times 100}}{{15000 \times 3}} \cr & = 12\% \,{\text{Per annum}}{\text{.}} \cr}$

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", "dateCreated": "7/24/2019 10:09:12 AM", "author": { "@type": "Person", "name": "Nitin Sir" } }, "suggestedAnswer": { "@type": "Answer", "text": "

Solution:

\begin{aligned} Rate = \frac{S .I . \times 100}{Principal \times Time} \\ = \frac{5400 \times 100}{15000 \times 3} \\ = 12 % Per annum . \end{aligned}

$\eqalign{ & {\text{Rate}} = \frac{{{\text{S}}{\text{.I}}{\text{.}} \times {\text{100}}}}{{{\text{Principal}} \times {\text{Time}}}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\, = \frac{{5400 \times 100}}{{15000 \times 3}} \cr & = 12\% \,{\text{Per annum}}{\text{.}} \cr}$ ", "dateCreated": "7/24/2019 10:09:12 AM" } }

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