Advertisements
Advertisements
Question
A pendulum swings through an angle of 30° and describes an arc 8.8 cm in length. Find the length of the pendulum.
Solution
Given:
Length of the arc = 8.8 cm
And,
θ = 30°
Now,
Length of the arc` = (2pi"r"theta)/360`
`=> 8.8 =(2xx22/7xx"r"xx360)/(360)`
`=>"r" = (8.8xx360xx7)/(44xx30)`
∴ r = 16.8 cm
Length of the pendulum = 16.8 cm
APPEARS IN
RELATED QUESTIONS
The area of a circle is 220 cm2. The area of ta square inscribed in it is
The radii of two circles are 8 cm and 6 cm. Find the radius of the circle having area equal to the sum of the areas of the two circles.
If a square is inscribed in a circle, find the ratio of the areas of the circle and the square.
The length of an arc of the sector of angle θ° of a circle with radius R is
A square is inscribed in a circle of radius 7 cm. Find the area of the square.
The diameters of two circles are 32 cm and 24 cm. Find the radius of the circle having its area equal to the sum of the areas of the two given circles.
Find the area of a ring-shaped region enclosed between two concentric circles of radii 20 cm and 15 cm.
If a square in inscribed in a circle, find the ratio of the areas of the circle and the square.
The area of a circle is 1386 sq.cm; find its circumference.
Area of a circle with diameter ‘m’ radius ‘n’ and circumference ‘p’ is ______.
