Question 610237
1 cm : 1.25 m


5*1 cm : 5*1.25 m


5 cm : 6.25 m


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1 cm : 1.25 m


12*1 cm : 12*1.25 m


12 cm : 15 m


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So the actual tank has a radius of 6.25 meters and is 15 meters tall


Now convert 15 meters to cm: 15*100 = 1500 cm


Then divide it by 12 cm:  1500/12 = 125


So the scale factor is 1/125


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Volume:


V = pi*r^2*h


V = pi*(6.25)^2*15


V = pi*39.0625*15


V = pi*585.9375


V = 585.9375pi


V = 585.9375(3.14159)


V = 1840.775390625


So the volume of the tank is approximately 1840.775390625 cubic meters


Surface area


SA = 2*pi*r^2 + 2pi*r*h


SA = 2*pi*(6.25)^2 + 2pi*6.25*15


SA = 2*pi*39.0625 + 2pi*6.25*15


SA = 78.125pi + 187.5pi


SA = 265.625pi


SA = 265.625(3.14159)


SA = 834.48484375


and the surface area is approximately 834.48484375 square meters.

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