Answer:
1912321 litres
Explanation:
4/3 π r³ is the equation needed to find the volume of the spherical tank
4/3 * π * 7.7³ =1912.32... m³
1000cm³=0.001 m³
therefore 0.001m³=1 litre
1912.32/0.001 = 1912320.959 litres
this can be rounded to 1912321 litres