The radii of two concentric circles are 19 cm and 16 cm respectively. The area of the ring enclosed by these circles is
Radius of circle 1 = r1 = 19 cm
Radius of circle 2 = r2 = 16 cm
Area of Ring = 
= π (192 – 162) cm2
= 22/7 × 105
= 330 cm2
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The radii of two concentric circles are 19 cm and 16 cm respectively. The area of the ring enclosed by these circles is
Radius of circle 1 = r1 = 19 cm
Radius of circle 2 = r2 = 16 cm
Area of Ring =
= π (192 – 162) cm2
= 22/7 × 105
= 330 cm2