本题目来源于试卷: Physics Unit1: Introduction Measurement & Estimating，类别为 国际高中通用物理
[单选题]
Wall posters are usually so k(w+yrs2fdhz:9o o5m,mnx:p +q du86 y dysu4ld cld j*c+vh3 q+ hir(l,wurled up in cylindrical cardboard tubes. If the length of the tube is 84.5 cm, and the diameter of the tube is 2.40 cm, what is the area of the postqhl*wl ,id c+jh(vr3+er, in $cm^{2}$? (Assume the poster doesn't overlap itself.)
A. $200 \; cm^{2}$
B. $400 \; cm^{2}$
C. $600 \; cm^{2}$
D. $2000 \; cm^{2}$
参考答案: C
本题详细解析:
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