Question

In how many years the sum of 20,000 earn an interest of 5,400 at the rate of 9 p. c. p. a. ?​

Answer 1

Given :

• Principal = Rs.20000
• Interest = Rs.5400
• Rate = 9 %

To Find :

• Time = ?

$\\ \qquad{\rule{200pt}{2pt}}$

SolutioN :

$\dag$ Formula Used :

• ${\underline{\boxed{\pmb{\sf{ Time = \dfrac{Interest \times 100}{Principal \times Rate} }}}}}$

$\dag$ Calculating the Time :

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { Time = \dfrac{Interest \times 100}{Principal \times Rate} } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { Time = \dfrac{5400 \times 100}{20000 \times 9} } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { Time = \dfrac{540000}{180000} } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; \sf { Time = \cancel\dfrac{540000}{180000} } \\ \\ \\ \end{gathered}$

$\begin{gathered} \qquad \; \longrightarrow \; \; {\underline{\boxed{\pmb{\sf { Time = 3 \; years }}}}} \; {\pink{\pmb{\bigstar}}} \\ \\ \\ \end{gathered}$

$\therefore \;$ The Time is 3 years .

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Answer 2

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QUESTION:-

In how many years the sum of 20,000 earn an interest of 5,400 at the rate of 9 p. c. p. a. ?

ANSWER:-

=> Time = Interest * 100 / Principal*Rate

=> Time = 5400*100 / 20000*9

=> Time = 540000 / 180000

=> Time = 3 years (ans)

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