Question 1154327
Rate of filling 10.5 L/min

height = 17.3 m 

Time of fill = 6.2 hours=372 minutes

volume of water = 10.5 *372 =3906 L

1m^3 = 1000 liters

3.906 m^3 

V = (1/3) (pi*r^2 *h)

(3.906 *3) /(pi*h)= r^2

r^2=0.215 

r=0.47 m is the radius