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31 July, 08:59

Two similar pyramids have base areas of 122 cm? and 16 cm? The surface area of the larger pyramid is 56 cm

What is the surface area of the smaller pyramid?

40.1 cm

42.7 cm

522 cm

59.8 cm

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Answers (1)
  1. 31 July, 09:10
    0
    42.7 cm sq.

    Step-by-step explanation:

    small/large = 16 / 122

    16/122 = S / 56

    S = 56 * (16/122) = 7.34 ...

    however not in the choice

    ah ha ...

    You meant : 12.2 sq. cm : 16 sq. cm = small / large

    so 12.2 / 16 = S / 56 cm

    S = 42.7 sq. cm
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