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A rectangular iron sheet is 45cm long and 30cm wide. If you cut a 5cm square from each corner to make a box, how many ml is the volume of the box?
Box (without cover)
Length: 45-2 × 5 = 35
Width: 30-2 × 5 = 20
High: 5
Volume: 35 × 20 × 5
A rectangular iron sheet, cut a 5cm square from each corner, and then make a box. How much iron sheet does this box use? How much volume?
The iron sheet was originally 30cm long and 25cm wide
The length after subtracting 5cm is 20cm
Minus 5cm, the width is 15cm
The area is 30x25-5x5x4 = 650cm2
The volume is 20x15x5 = 1500cm3
A rectangular iron plate, 30 cm in length and 25 cm in width. As shown in the figure, cut the square with a side length of 5 cm from four corners, and then make a box. How many ml is the volume of this box?
Because the length of the box is 30-5 × 2 = 20 (CM), the width is 25-5 × 2 = 15 (CM), and the height is 5 cm, the volume of the box is: 20 × 15 × 5, = 300 × 5, = 1500 (CC), = 1500 (ML); a: the volume of the box is 1500 ml
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