Answer:
6.86 m/s
Explanation:
velocity of the gasoline through the hole would be
[tex]v = \sqrt {2gh}\\v = \sqrt {2\times 9.8\times 0.35} =6.86 m/s[/tex]
As the height would decrease, the velocity of the flow would decrease.
If the lid of the tank would be closed, the pressure would reduce. so, again the velocity of the flow would reduce.