Question

find the areas of the space enclosed by two concentric circles of radii 9cm and 5cm.​

Answer 1

Answer:

Step-by-step explanation:

The area of the region enclosed by two concentric circles is given by:  

A = π (R2 – r2)  

Here, R = 9cm, rr = 5 cm and π = 3.14  

So Area, A = 3.14 (92 – 52) sq cm = 3.14 (81 – 25) sq cm = 175.84q. cm.