Answer:
the answer is 6107.24 meters cubed filled.
Explanation:
the volume of a hemisphere is v=(2/3)πr^3
simply plug in the radius which is 9 since its half the diameter to get
v=(2/3)π9^3
v=(2/3)π729
v=(2/3)2290.22
v= 1526.81
the volume of 1 bowl is 1526.81
after this you just have to multiply it by 4 to get the total volume needed
1526.81*4=6107.24