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Step-by-step explanation:
1 :
radii of the first circle = 6cm = r1
radii of the second circle = 4cm = r 2
area of first circle = pi ×r1 ^2
= 3.14 × 6× 6
=113.04cm^2
area of second circle = pi ×r2^ 2
= 3.14 ×4×4
= 50.24cm ^2
shaded region =113.04- 50.24
= 62.80cm ^2 it is the answar
2 answar:::::::
area of bigger circle is = 164 pi cm^2
area of smallest circle is = 61 pi cm ^2
find redius
formula for biggest circle
= Pi ×R 1^2 = 164 pi cm ^ 2
pi cut from both side
R1 = √ 164 = 12.806248 cm
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