The radii of some circles are given below. Find their area.

(1) 28 cm (2) 5.6 m

(3) 7.7 m (4) 6.3 m

(5) 35 cm

(1). Given: radius, r = 28 cm

We have

Area is given by,

Area = πr²

⇒ Area

⇒ Area

⇒ Area

Thus, area of the circle is 2464 cm².

(2). Given: radius, r = 5.6 m

We have

Area is given by,

Area = πr²

⇒ Area

⇒ Area

⇒ Area

Thus, area of the circle is 98.56 m².

(3). Given: radius, r = 7.7 m

We have

Area is given by,

Area = πr²

⇒ Area

⇒ Area

⇒ Area

Thus, area of the circle is 186.34 m².

(4). Given: radius, r = 6.3 m

We have

Area is given by,

Area = πr²

⇒ Area

⇒ Area

⇒ Area

Thus, area of the circle is 124.74 m².

(5). Given: radius, r = 35 cm

We have

Area is given by,

Area = πr²

⇒ Area

⇒ Area

⇒ Area

Thus, area of the circle is 3850 cm².