Question

the area between the concentric circle whose radius are 4cm and 2cm is​

Answer 1

Answer:

75.36cm²

Step-by-step explanation:

The Radius of the circle with radius 4cm = 100.48cm²

The Radius of the circle with radius 2cm = 25.12cm²

answer = 100.48cm² - 25.12cm² = 75.36cm²

Answer 2

Answer:

$12\pi$

Step-by-step explanation:

Area of concentric circle =

$\pi( {r}^{2} - {t}^{2} )$

r= radius of larger circle=4

t= radius of smaller circle =2

$\pi( {4}^{2} - {2}^{2} )$

$\pi(16 - 4)$

$\pi \times 12$

$12\pi$