A supermarket is designed to have a rectangular floor area of 3750 m² with 3 walls made of cement blocks and one wall made of glass. In order to conform to the building code, the length of the glass wall must not exceed 60 m, but must not be less than 30 m. The cost of a glass wall per metre is twice the cost of a cement wall per metre. Determine the dimensions of the floor that will minimize the cost of building the walls.

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ISBN:9780470458365
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8. A supermarket is designed to have a rectangular floor area of 3750 m²
with 3 walls made of cement blocks and one wall made of glass. In order
to conform to the building code, the length of the glass wall must not exceed
60 m, but must not be less than 30 m. The cost of a glass wall per metre
is twice the cost of a cement wall per metre. Determine the dimensions
of the floor that will minimize the cost of building the walls.
Transcribed Image Text:8. A supermarket is designed to have a rectangular floor area of 3750 m² with 3 walls made of cement blocks and one wall made of glass. In order to conform to the building code, the length of the glass wall must not exceed 60 m, but must not be less than 30 m. The cost of a glass wall per metre is twice the cost of a cement wall per metre. Determine the dimensions of the floor that will minimize the cost of building the walls.
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