22. Volume of Water in a Reservoir.

A reservoir shaped like a
hemispherical bowl of radius 8 m is filled with water to a depth
of 4 m.

(a) Find an estimate S of the water's volume by approximating the
water with eight circumscribed solid cylinders.

(b) It can be shown that the water's volume is V = (320•pi)/3 m³.
Find the error |V-S| as a percentage of V to the nearest
percent.