If frightened dot ran from −66 to −17 for 7 minutes then, the distance is units and the average speed is units per minute.

          Height of the cylindrical oil storage tank = h =12 meters
And   The diameter = d = 25 meters ⇒⇒⇒ Radius = r = d/2 =12.5 meters
∴       Volume = π r² h
                      = 3.14 * 12.5² * 12
                      = 5,887.5 m³
                      = 5,887.5 kL

So, the solution is option (d)