Answer
$9.2cm$
Work Step by Step
Density = $0.953g/mL=0.953g/cm^3$
Height = $21.5cm$
Mass = $1.360\times10^3g$
$Volume=\frac{Mass}{Density}$
$=\frac{1.360\times10^3}{0.953}=r^2(21.5)π$
$r=\sqrt{\frac{1.360\times10^3}{(0.953)(21.5)π}}$
$d=2r=2\sqrt{\frac{1.360\times10^3}{(0.953)(21.5)π}}$
$\approx9.193033299090484$
$d=9.2cm$