The area of the sector of a circle is 128$cm^{2}$. If the length of the arc of that sector is 64 cm, then find the radius of the circle.
Answer & explanation
Correct answer: option 1
We know that,
Area of the arc = \(\frac{L × r}{2}\)
We have,
Area of the sector of a circle = 128 cm2
Length of the arc = 64 cm = L
Area = 128 = \(\frac{64 × r}{2}\)
= r = 4 cm