Q5 of 37 Page 13

An arc of a circle of radius 42cm has a length 35.2 cm. Find the angle subtended by the arc at the centre of the circle.


Given: Length of the arc = 35.2 cm


Radius of a circle, r = 42cm


To find: Central Angle of the sector


Now,


Length of an arc of a sector of angle θ






⇒ θ = 48°


Hence, the angle subtended by the arc at the centre of the circle is 48°


More from this chapter

All 37 →
3

A pendulum swings through an angle 60° and describes an arc 8.8 cm in length. Find the length of the pendulum

4

A wire made of silver is looped in the form of circular ear ring of radius 5.6 cm. It is rebent into a square form. Determine the length of the side of the square.

 6

A car has wheels which are 80 cm in diameter. How many complete revolutions does each wheel make in 10 minutes when the car is moving at a speed of 80 km per hour?

 7

Rajeev walks around a circular park of area 88704 sq. m How long will he take to walk 10 rounds at the speed of 4.5 km per hour?