In a certain time, the ratio of a certain principal and interest obtained from it are in the ratio 10:3 at 10% interest per annum. The number of years for which the money was invested is = ?

11 year
23 year
35 year
47 year

Answer:- 1

Explanation:-

Solution:

According to the question

Principal	Interest
10	3

\begin{aligned} Rate % =  10 % \\ Time  = \frac{3}{10} \times \frac{100}{10} \\ = 3 years \end{aligned}

$\eqalign{ & {\text{Rate }}\% {\text{ = 10}}\% \cr & {\text{Time = }}\frac{3}{{10}} \times \frac{{100}}{{10}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\, = 3\,{\text{years}} \cr}$

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

Solution:

According to the question

Principal	Interest
10	3

\begin{aligned} Rate % =  10 % \\ Time  = \frac{3}{10} \times \frac{100}{10} \\ = 3 years \end{aligned}

$\eqalign{ & {\text{Rate }}\% {\text{ = 10}}\% \cr & {\text{Time = }}\frac{3}{{10}} \times \frac{{100}}{{10}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\, = 3\,{\text{years}} \cr}$ ", "dateCreated": "7/24/2019 10:09:12 AM" } }