Q6 of 157 Page 852

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

Radius of circle = R = 21 cm

Angle subtended by arc = 60°

Length of an arc of a sector of angle of a circle with radius R

= Circumference of circle × θ/360

Length of arc = 2 × 22/7 × 21 × θ/360 cm = 22 cm

Length of arc = 22 cm

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

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

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

The perimeter of a sector of a circle of radius 5.6 cm is 27.2 cm. Find the area of the sector.