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The area of a circle is …

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The area of a circle is 154 cm square find its circumference

    • Posted by Piyush Mourya 6 years, 11 months ago

    CBSE > Class 07 > Mathematics
    • 1 answers

    Yogita Ingle 6 years, 11 months ago

    Area of circle =  πr2
    154 = 22/7 × r2
    r2 = 154 × 7/22
    r2 = 7 × 7
    r = 7
    Circumference = 2  πr
    = 2 × 22/7 × 7
    = 2 × 22
    44 cm

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