Question: d ) A rectangular fish tank with cover has a volume of 2 5 0 m 3 . The top cover and bottom of the

d) A rectangular fish tank with cover has a volume of 250m3. The top cover and bottom of the tank is specially designed with acrylic material costing 40 cents per square m. While the sides are made from glass material costing 20 cents per square m. Use Lagrange multipliers to find the dimensions of the tank so that the cost of the materials is minimized.
l=1,w=5,h=(v,cos)=km0
Sebuah tangki ikan dengan penutup mempunyai isipadu sebanyak 250m3. Penutup dan dasar tangki direka khas dengan kos bahan akrilik sebanyak 40 sen setiap meter persegi. Manakala sisi-sisinya dibuat dengan kos bahan gelas senyak 20 sen setiap meter persegi. Gunakan pendarab Lagrange untuk mendapatkan dimensi tangka itu supaya kos bahan-bahan adalah minimum.
(8 marks/markah)
d ) A rectangular fish tank with cover has a

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