Question

What is the rate of simple interest for the first 4 year if the sum of rs 360 becomes rs 540 in 9 year and the rate of interest for the last 5 year is 6%?
a. 4%
b. 5%
c. 3%
d. 6%

Answer 1

\(\large\tt \begin{align} \color{black}{

540=360+360\times \dfrac{4r+30}{100}
}\end{align}\)