its B. 60 meters
Explanation:
cause I looked up a calculator and solved it
If an object is moving with a constant velocity, then by definition it has zero acceleration. So there is no net force acting on the object. The total work done on the object is thus 0 (that's not to say that there isn't work done by individual forces on the object, but the sum is 0 ).
The first choice on the list is the correct one.
Answer:
It will take 20,000 seconds to get a pressure of 200Pa at the bottom of the tank.
Explanation:
The pressure at the bottom of the tank will be

where
is the mass of the water, and
is the base area of the tank.
The base area of the tank is
,
and if we want the pressure at the bottom to be 200pa, then it must be that
,
solving for
we get:

which is the required mass of the water in the tank.
Now, the tank fills at a rate of 2 drops per second or

since each drop weights 0.05g.
Therefore, the time
it takes to collect 20kg of water will be


which is 55.56 hours or 2 days and 7.56 hours.
Thus, it will take 20,000 seconds to get a pressure of 200Pa at the bottom of the tank.