Answer:
86,400 ft³
Step-by-step explanation:
Given dimension ratios 10:5:8 = length : width : height, and the height being 18 ft longer than the width, you want to know the volume of the cuboid tank.
The volume is the product of the length, width, and height. In "cubic ratio units", it is 10·5·8 = 400 cubic ratio units.
The difference between height and width is 8-5 = 3 ratio units, which represents 18 ft. That is, each ratio unit is 6 ft. This means the tank volume is ...
400 × (6 ft)³ = 86,400 ft³
The volume of the tank is 86,400 cubic feet.
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Additional comment
The dimensions of the tank are 60 ft by 30 ft by 48 ft.
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