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5 March, 15:59

Sarah's hand length is 20 cm. She measures the dimensions of her rectangular floor to be 18 by 22 hand lengths. Which of the following is the closest to the area of the floor? (A) 160 000 cm2 (B) 80 000 cm2 (C) 200 000 cm2 (D) 16 000 cm2 (E) 20 000 cm2

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  1. 5 March, 18:17
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    Lenght=22 hand * (20 cm/1 hand) = 440 cm

    width=18 hand * (20 cm/1hand) = 360 cm

    Area=lenght x width.

    Area=440 cm * 360 cm=158,400 cm²≈160,000 cm²

    A) 160,000 cm²
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