Question

A cubical tank can store 5040 litre of water. The external dimension of the tank are 2.2m*1.7m*1.7m. If the walls of the tank are 5 cm thick? then what is the thickness of the bottom of the tank

Answer 1

Let the thickness of the bottom of the tank be x metre ;
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Thickness of the wall = 5 cm = 0.05 m

Volume of the tank = 5040 litre
= 5040/1000 m cube
= 5.04 m^3
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Length of the inner tank
= 2.2 -(2×0.05)
= 2.1 m
Breath of the inner tank
= 170 - (2×5)
= 1.6 m
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Height of the tank = (1.7-x) m
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Volume = length×Breath×Height
5.05 = 2.1×1.6×(1.7-x)
1.7 - x = 1.5
x = 1.7-1.5
x = 0.2 m
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Thickness of the bottom of the tank is 0.2 m or 20 cm