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With 12 cm long, 10 cm wide rectangular cardboard put together into a square, at least how many pieces of cardboard?
30 yuan
Find the least common multiple of 12 and 10 to be 60
So the side length of a square is 60
It needs 5 pieces per line, 6 lines in total
A piece of rectangular cardboard is 12 decimeters long. Cut the square with side length of 1 decimeter from four corners to make a box
How much? Right away
The length of the box is 12-2 = 10 decimeters
The width of the box is 10-2 = 8 decimeters
The height of the box is one decimeter
Volume (volume) l * w * H = 80 cubic decimeter
How many pieces of rectangular cardboard do you need at least to make a square cardboard with a 15 decimeter long and 10 decimeter wide rectangular cardboard?
The area of each rectangle is 15 * 10 = 150
Suppose that the side length of the square is x, so x * x = n * 150, as long as we can find the multiple of 150, and it can also be the square of a number, we need at least 6, because 6 * 150 = 900, 900 = 30 * 30 is just a square
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