1.

The circumference of a circle is 440 cm. The area of square inscribed in the circle is:1). 9750 cm22). 9720 cm23). 9600 cm24). 9800 cm2

Answer»

CIRCUMFERENCE of CIRCLE = 2πr, where r is the RADIUS of circle.

⇒ 2πr = 440

∴ r = 440/2π = 70 cm

⇒ Diameter of the circle = 2r = 140 cm

Diameter of circle = DIAGONAL of the square

⇒ √2a = 140

∴ a = 140/√2

⇒ Area = a2 = 9800 cm2


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