The area of the sector of a circle is 128 cm2. If the length of the arc of that sector is 64cm, then find the radius of the circle.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 4 cm
Formula used
Area of a sector = lr/2
where, l = arc length
r = radius of a circle
Given that
Area of a sector = 128 cm2
Arc length l = 64 cm
Calculation
Area a sector = 64 * r/2 = 128
32* r = 128
r = 128/32 = 4 cm