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A girl wishes to prepare birthday caps in the form of right circular cones for her birthday party, using a sheet of paper

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A girl wishes to prepare birthday caps in the form of right circular cones for her birthday party, using a sheet of paper whose area is 5720 cm2, how many caps can be made with radius 5 cm and height 12 cm.

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Radius of a cap (r) = 5 cm

Height of a cap (h) = 12 cm

Total Area of a sheet of paper = 5720 cm2

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