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What is the surface area and volume of a cuboid whose ratio of length, width and height is 4:3:2 and whose total length of edges is 108 cm?
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A rectangular parallelepiped has a surface area of 120 square centimeters and a cross-section of a square with a side length of 1 cm. 1) How many square centimeters of is the surface area of the remaining cuboid reduced by cutting off a small cuboid? (2) What is the surface area of the cuboid after cutting off 5 small cuboids? A rectangular parallelepiped has a surface area of 120 square centimeters and a cross-section of a square with a side length of 1 cm. 1) How much square centimeter is the surface area of the remaining cuboid reduced by cutting off a small cuboid? (2) What is the surface area of the cuboid after cutting off 5 small cuboids?
The cross-section is a 1 cm square, so the width of the cuboid is 1, the height of the cuboid is 1,(120-2)/4=29.5, so the length of the cuboid is cut down by 1, so (29.5-1)*1*4=116,120-116=4, so the cuboid is 4CMsquare2).
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