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13 July, 01:16

Round cake has a diameter of 30 cm. Angela places the cake on a circular cake board with a diameter 5 cm longer than that of the cake. What's the circumference

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  1. 13 July, 01:54
    0
    the circumference is 35 pi
  2. 13 July, 03:19
    0
    circumference of the cake board = 109.9 cm

    Step-by-step explanation:

    diameter of cake = 30cm

    diameter of cake board = 5cm longer than 30cm = 5 + 30 = 35cm

    radius cake board = diameter : 2 = 35 : 2 = 17.5 cm

    radius of cake board = 17.5 cm

    circumference of a circle = 2 * π * r (where π = 3.14)

    circumference of a circle = 2 * 3.14 * 17.5 = 109.9 cm

    Therefore the circumference of the cake board = 109.9 cm
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