Question

Area of a ring of outer and inner diameters as 21 cm and 14 cm is sq.cm.​

Answer 1

Answer:

Area Of A Ring is π (R^2 - r^2)

Inner Radius Is 7

Outer Radius is 10.5

So Putting In The Formula

3.14 × ( 10.5^2 - 7^2 )

Answer Will Be .. 192.42.