6667 are about the A series of paper. Many countries use

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6667 are about the A series of paper. Many countries use A4 paper, which is different from the 8.5 by 11 inch paper used in the US.40 Two sheets of A4 paper, if laid side by side (not end to end), are the same size as one sheet of A3 paper. Likewise, two sheets of A3 are the same as one sheet of A2, and so on. See Figure 1.71. Each sheet in the series has the same proportions, length to width, and the largest sheet, A0, has an area of exactly 1 m2. Figure 1.71 We know that A1 paper has the same proportions (lengthover width) as A0. Further, the length of A1 paper is thesame as the width of A0, and the width of A1 is halfthe length of A0. (See Figure 1.71.)(a) Find a formula for in terms of . What does yourformula tell you about the shape of A-series paper?How does the shape compare to US letter paper?(b) Given that A4 paper has area 625 cm2, find its widthand height.

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