The main tank has a radius of 70 feet. what is the volume of the quarter-sphered sized tank? round your answer to the nearest whole number.

Volume of sphere = (4/3) x pi x r ^3
Given:
r = 70 feet
pi = 3.14 

substituting the values:
Volume of sphere = (4/3) x 3.14 x 70 ^3
                             = 1436,026.67 Feet cubed
Since,
we have to find the volume of the quarter.
so divide the volume by 4.
Hence,
Volume of sphere = 1436,026.67 Feet cubed / 4
                             = 359,006.67 Feet cubed