Question

the simple interest on a certain sum of money at 7/2% per annum for 47/21 year is Rs.658 the sum is​

Answer 1

Let the sum = P

time = 2 \frac{1}{3} 2

3

1

years = 7/3 years

rate = 3 \frac{3}{4} 3

4

3

% = 15/4 % per annum

SI = Rs. 210

\begin{gathered}SI = \frac{PTR}{100} \\ \\ \Rightarrow P = \frac{100 \times SI}{TR} \\ \\ \Rightarrow P = \frac{100 \times 210}{ \frac{7}{3} \times \frac{15}{4} } =\frac{100 \times 210 \times 3 \times 4}{ 7\times 15 } =Rs.\ 2400\end{gathered}

SI=

100

PTR

⇒P=

TR

100×SI

⇒P=

3

7

×

4

15

100×210

=

7×15

100×210×3×4

=Rs. 2400

The sum is Rs. 2400