question_answer

In what time will Rs.72 become Rs. 81 at \[{{n}_{1}}+{{n}_{2}}+.....{{n}_{k}}\]p.a. SI?

A)  \[V={{V}_{0}}{{\left( 1-\frac{{{R}_{1}}}{100} \right)}^{{{n}_{1}}}}.{{\left( 1-\frac{{{R}_{2}}}{100} \right)}^{{{n}_{2}}}}....{{\left( 1-\frac{{{R}_{k}}}{100} \right)}^{{{n}_{k}}}}\]year                 

B)  \[=P{{\left( 1+\frac{R}{100} \right)}^{n}}\]years            

C) 2 years              

D) None of these