Q5 of 157 Page 852

The circumference of a circle is 22 cm. Find its area. [Take π = 22/7]

Let the radius if circle be r

Circumference of circle = 22 cm

2πr = 22 cm

2 × 22/7 × r = 22 cm

r = 22 × 1/2 ×7/22 cm

r = 3.5 cm

Area of Circle =

= 22/7 × 3.5 × 3.5 cm²

= 38.5 cm²

∴ Area of Circle = 38.5 cm²

The area of a sector of a circle with radius r, making an angle of x° at the centre is x

In the given figure, ABCD is a rectangle inscribed in a circle having length 8 cm and breadth 6 cm. If π = 3.14 then the area of the shaded region is

In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. Find the length of the arc.

The minute hand of a clock is 12 cm long. Find the area swept by it in 35 minutes.