What will be the perimeter (in cm) of the sector of a circle of radius 4.9 cm having central angle 144° (use )?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 22.12.
Given that
Radius of a circle R = 4.9 cm
Central angle = 144º
Formula used
The perimeter of the sector of a circle = 2 R + R θ π/180
where r = radius of the circle, θ = angle of the sector in degree
Calculation
Perimeter = 2 × 4.9 + 4.9 × 144 × π/180
= 22.12 cm