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  1. Two equal circles of radius 4 cm intersect each other such that each passes through the centre of the other. The length of the common chord is :
    1. 2√3 cm
    2. 4√3 cm
    3. 2√2 cm
    4. 8 cm
Correct Option: B

According to question , we draw a figure of two equal circles of radius 4 cm intersect each other such that each passes through the centre of the other ,

OC = 2cm
OA = 4cm
∴ AC = √OA² - OC²
∴ AC = √4² - 2² = √16 - 4
AC = √12 = 2√3
∴ AB = 4√3cm



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