
Arturo O. answered 06/28/17
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I assume that by "circuil" you really meant circumference. Find the volume of the tank (a cylinder), and multiply by the density of water to get the mass of water that fills the tank.
V = πr2h
C = circumference = 2πr = 3800 mm
h = height = 1500 mm
r = C/(2π)
V = π [C/(2π)]2 h = C2 h / (4π) = (3800 mm)2 (1500 mm) / (4π)
Do the calculation and get V in mm3. The density of water is
ρ = 1 g/cm3 = 10-3 kg/cm3
Convert the volume from mm3 to cm3, and multiply by the water density in kg/cm3 and you will have the number of kg of water that fills the tank.