$$PT-P(1+R/r00)T; 6021+632=20,000(1+R/100)^{2}; 21,632=(1+R/100)^{2}; 20,000$$
$PT=0,\ R=\frac{\sqrt{25030790}}{50}-100\text{ or }R=-\frac{\sqrt{25030790}}{50}-100,\ \text{false}$
