Question

Find the time when:

Principal = Rs 5000, amount = Rs 6450 and rate = 12% p.a.

Answer 1

$\begin{array}{l}\text{P}=\text{Rs}\text{. 5}000,\text{A=Rs}\text{. 645}0,\text{R}=\text{12}\%\\ \text{S}.\text{I.}=\text{A}-\text{P}\\ =\text{645}0-\text{5}000\\ =\text{Rs}\text{. 145}0\\ \\ \text{T =}\frac{\text{S}\text{.I×100}}{\text{P×R}}\text{=}\frac{\text{1450×100}}{\text{5000×12}}\\ \text{=}\frac{\text{29}}{\text{12}}\\ =2\frac{5}{12}\\ \text{=2 years 5 months}\end{array}$