Answer
Please see the work below.
Work Step by Step
We know that
$Potential \space energy=mgh$
We plug in the known values to obtain:
$Potential \space energy= 2.1\times 10^{10}\times 9.8\times 214$
$Potential \space energy=4.404\times 10^{13}J$
(b) We know that
$P=\frac{W}{T}$
This can be rearranged as:
$T=\frac{W}{P}$
We plug in the known values to obtain:
$T=\frac{4.404\times 10^{13}}{1.08\times 10^9}$
$T=40778.88s=11.32 Hours$
