Answer:
volume of quarter sphere is  359006 cubic feet
Explanation:
Given data
radius = 70 feet
to find out
the volume of quarter sphere size tank
solution
we know that volume of sphere is 4/3× π× r³
so that when volume of of quarter sphere size
so The quarter of a sphere has 1 quarter of that volume
that is volume
volume will be  ( 1/3× π× r³ ) Â
now put the value r = 70 feet, Â and solve it
volume of quarter sphere =  ( 1/3× π× r³ ) Â
volume of quarter sphere =  ( 1/3× π× 70³ ) Â
volume of quarter sphere = Â 1077020 / 3
volume of quarter sphere is  359006 cubic feet