43.0 square centimeters of paper are required to make each wristband.
What is area of curved surface?
The curved surface of a cylinder is equal to a rectangle whose length is
2[tex]\pi[/tex]r and whose width is h.
The area of the curved surface = [tex]\pi dh[/tex].
Given
Height of wrist band = 1.8 cm
Diameter of wrist band =7.5 cm
Wrist band is a cylinder
Area of curved surface
S = [tex]\pi dh[/tex]
= 3.14 × 7.5 × 1.8
= 42.9552 ≅ 43.0 [tex]cm^{2}[/tex]
Hence, 43.0 square centimeters of paper are required to make each wristband.
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