Question

At what rate percent per annum simple interest will a sum of $Rs100$ become $Rs300$ in $16$ years?

Answer 1

let rate present $=x$

We know,

$S.I.=\frac{PRT}{100}$

$A=S.I+P$

$300=100+\frac{100\times x\times 16}{100}$

$200=x\times 16$

$x=12.5\%$