Question

help picture added !

Answer 1

Area of a circle \[=\pi \times r ^{2}\]
where r is the radius
The radius in the figure is \[\pi \times x ^{3}\]
If we substitute the value for the radius into the general formula for the area we get\[area=\pi \times \pi ^{2}\times x ^{6}=\pi ^{3}x ^{6}\]