A cosmetics company that makes small cylindrical bars of soap wraps the bars in plastic prior to shipping. Find the surface area of a bar of soap if the diameter is 5 cm and the height is 2 cm.
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༆ ɑnswer ࿐
diameter = 5cm
radius = 5/2cm
height = 2cm
total surface area = 2πr (h+r) = 2x3.14 x 5/2(2+5/2)
= 3.14 x 5(9/2)
= 15.7 x 9/2
= 7.85 x 9
= 70.65
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