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A rectangular sheet of paper 40cm …

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A rectangular sheet of paper 40cm * 22cm ,is rolled to form a hollow cylinder of height 40cm. The radius of the cylinder ( in cm ) is

    • Posted by Renuka Chawla 6 years, 9 months ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Nandini Verma 6 years, 9 months ago

    H = 40 cm when the sheet is rolled 22 cm becomes the circumference of the base circles. circumference = 22 cm 2 π r = 22 cm 2×22/7×r = 22 cm r = 22×1/2×7/22 r = 7/2 r = 3.5

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