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Q.2 Find the area of the following circles, given that (Take \(\pi =\frac{22}{7} \))
(a) radius = 14 mm
(b) diameter = 49 m
(c) radius = 5 cm
Answer :

(a) Given, r = 14 mm \(\therefore \) Area of the circle =\( \pi r^2 \)
= \(\pi × 14 × 14 = \frac{22}{7} × 14 × 14 = 616mm^2\)
(b) Given, r = 49 m \(\therefore \)Area of the circle =\(\pi r^2 \)
= \(\pi × 49 × 49 = \frac{22}{7} × 49 × 49= 1886.5 m^2 \)
(c) Given, r = 5 cm \(\therefore \) Area of the circle =\( \pi r^2 \)
= \(\pi × 5 × 5 = \frac{22}{7} × 5 × 5= 78.57 cm^2 \)