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Question Number 218886 by Spillover last updated on 17/Apr/25

Answered by mr W last updated on 17/Apr/25

Commented by Spillover last updated on 17/Apr/25

perfect

perfect

Commented by mr W last updated on 17/Apr/25

2R−2r=18 ⇒R−r=9  R−(√(r^2 −(R−r)^2 ))=10  R−10=(√(2Rr−R^2 ))  ⇒R=50 ⇒r=41  A_(shade) =π(R^2 −r^2 )=819π ✓

2R2r=18Rr=9Rr2(Rr)2=10R10=2RrR2R=50r=41Ashade=π(R2r2)=819π

Answered by Spillover last updated on 17/Apr/25

Answered by Spillover last updated on 17/Apr/25

Answered by Spillover last updated on 17/Apr/25

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