Perimeter of a square and circumference of a circle are in the ratio 8:11, respectively. If area of the square is 64 cm2, then find the radius of the circle. (Take π = 22/7)
Let the perimeter of the square and circumference of the circle be ‘8x’ cm and ‘11x’ cm, respectively. Area of square = a2 (Where ‘a’ is the side of the square) ATQ; 64 = a2 Or, a = 8 cm So, perimeter of the square = 8 × 4 = 32 cm So, circumference of circle = 32 × (11x/8x) = 44 cm Circumference of circle = 2πr (Where ‘r’ is the radius) So, 44 = 2 × (22/7) × r Or, r = 7 cm Therefore, radius of the circle is 7 cm.
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