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A conical cup is made from a circular piece of paper with radius 8 cm by cutting out a sector and joining the edges as
A conical cup is made from a circular piece of paper with radius 8 cm by cutting out a sector and joining the edges as shown below. Suppose 6 = 77r/4. 8cm (a) Find the circumference C of the opening of the cup. c = 14ft cm a? (b) Find the radius r of the opening of the cup. [Hint Use C = 21m] r = 7 cm W (c) Find the height h of the cup. [Hint Use the Pythagorean Theorem.] [1: V15 cm W (d) Find the volume Vof the cup. V = cm3 X
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