If the outer and inner radii of a circular path are 2a and b, then its area is ___________ sq. units.

Correct option is C

Given:

Outer radius R = 2a

Inner radius r = b

Formula Used:

Area $$= \pi (R^2 - r^2)$$​

​Solution:

Area =$$\pi \left((2a)^2 - b^2\right) = \pi (4a^2 - b^2)$$​