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The surface area of a cylinder is given by the formula:
Surface Area = 2πr(r + h)
Given:
Diameter = 0.5 cm
Radius (r) = Diameter / 2 = 0.5 / 2 = 0.25 cm
Length (h) = 19 cm
Plugging in the values:
Surface Area = 2 * 3.14 * 0.25(0.25 + 19)
Surface Area = 2 * 3.14 * 0.25(19.25)
Surface Area = 2 * 3.14 * 4.8125
Surface Area = 30.19 cm^2
Therefore, the surface area of Ming's bundle of pencils is approximately 30.2 cm^2.