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Perimeter And Area Test - 4

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  • Question 1
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    If the radius of a circle increases to 4 times its initial value, then the circumference of the circle will become __________ its initial value.

    Solution

    Initial radius = r

    Initial circumference of the circle = 2πr
    New radius = 4r

    New circumference of the circle = 2π(4r) = 8πr
    The circumference becomes 4 times its initial value.

     

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