Question

the area of a circular ring is 942.6 cm square and the radius of larger circle is 20 cm.calculate the area of the smaller circle​

Answer 1

Answer:

bro I do not know plese follow me

Answer 2

$\huge \color{maroon}ANSWER:$

Area of smaller circle = Area of larger circle - Area of ring

942.6 cm² = πR² - πr²

πr² = (3.14 × 20 × 20) - 942.6 cm²

πr² = (3.14 × 400) - 942.6 cm²

πr² = 1256.8 cm² - 942.6 cm²

πr² = 314.2 cm²

Now,

Thickness of ring = Radius of Bigger circle - Radius of smaller circle

πr² = 314.2 cm²

r² = (314.2 / π) = (314.2/3.142)

r² = 100

r = √100 = 10 cm