(a) Area of circle = π r ^{2}

= 22 /7x14 x14

= 22 x 2 x 14 = 616 mm^{2}

(b) Diameter = 49 m

\ radius = 49/2 = 24.5 m

\ Area of circle = π r ^{2}

= 22/7 x 24.5 x 24.5

= 22 x 3.5 x 24.5

= 1886.5 m^{2}

(c) Area of circle = π r ^{2}

= 22/7 x 5 x 5

= 550/7 cm^{2}