Determine the height of the water tower if the pressure on the pipe wall at its base is 420 kPa.

Initial data: P (water pressure on the pipe wall at the base of the water tower) = 420 kPa = 420 * 10 ^ 3 Pa.

Constants: ρ (water density) = 1000 kg / m3; g (acceleration due to gravity) = 10 m / s2.

We express the height of the water tower from the following formula: Р = ρ * g * h, whence h = Р / (ρ * g).

Let’s calculate: h = 420 * 10 ^ 3 / (1000 * 10) = 42 m.

Answer: The height of the water tower is 42 meters.