Question: 14. Construction plans for a bomb-shelter call for a rectangular metal structure measuring 5m long by 4m wide by 3m high. The metal structure is

 14. Construction plans for a bomb-shelter call for a rectangular metal

14. Construction plans for a bomb-shelter call for a rectangular metal structure measuring 5m long by 4m wide by 3m high. The metal structure is to be surrounded on all six sides with a layer of concrete of uniform thickness. a. Determine an expression for the volume of the concrete as a function of its thickness. (2 marks) b. Find the thickness of the concrete shield if the volume of the concrete is 444 m3. (2 marks

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