Question

at what rate percent will a sum of rs64000 be compounded to rs68921 in three years​

Answer 1

Step-by-step explanation:

$\implies$ $A=P{\Large(}1+{\Large\frac{r}{100})}^{3}$

$\implies$ $68921=64000{\Large(\frac{100+r}{100})}^{3}$

$\implies$ ${\Large\frac{68921}{64000}}={\Large(\frac{100+r}{100})}^{3}$

$\implies$ $\sqrt[3]{\Large\frac{68921}{64000}}=\Large\frac{100+r}{100}$

$\implies$ ${\Large\frac{41}{40}}=\Large\frac{100+r}{100}$

$\implies$ ${\Large\frac{41×100}{40}}=100+r$

$\implies$ $102.5-100=r$

$\implies$ $\large\boxed{r=2.5\: Percent}$

________________________________

$<b><i><marquee>Mark as Brainliest :)$