Question 12 Marks
Find the simple interest, when: Principal $= Rs. 1200$, Rate of Interest $= 18\%$ per annum, and Time $= 4$ month.
Answer
View full question & answer→Principal $(P) = Rs. 1200,$
Rate of interest $(R) = 18\% p.a.$,
Time $(T) = 4$ month $\text{T}=\frac{4}{12}=\frac{1}{3}\ \text{year}$
$\Big(\because 1\text{ month} =\frac{1}{12}\ \text{year}\Big)$
Simple interest $=\frac{\text{P}\ \times\ \text{R}\ \times\ \text{T}}{100}$
$=\frac{1200\ \times\ 18\ \times\ \frac{1}{3}}{100}$
$=\frac{1200\ \times\ 18\ \times\ 1}{100\ \times\ 3}$
$=\text{Rs. }720$
Rate of interest $(R) = 18\% p.a.$,
Time $(T) = 4$ month $\text{T}=\frac{4}{12}=\frac{1}{3}\ \text{year}$
$\Big(\because 1\text{ month} =\frac{1}{12}\ \text{year}\Big)$
Simple interest $=\frac{\text{P}\ \times\ \text{R}\ \times\ \text{T}}{100}$
$=\frac{1200\ \times\ 18\ \times\ \frac{1}{3}}{100}$
$=\frac{1200\ \times\ 18\ \times\ 1}{100\ \times\ 3}$
$=\text{Rs. }720$