Question

the outer and inner radii of a ring are 10 cm and 8cm respectively.then the area of ring is cm square is

Answer 1

area of ring
$\pi \times {r -}^{2} - \pi \times {z}^{2}$
where "r" ie the larger radius
and "z" is the smaller radius
answer :113.14 cm^2

Answer 2

Answer is in the attachment.