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Wwwwwwwwwwwwwwwwwwwwwwwwww

Wwwwwwwwwwwwwwwwwwwwwwwwww-example-1

1 Answer

5 votes

Answer:

84

Explanation:

reqd. area=outer area-inner area

=20*15-18*12

=300-216

=84 square inches

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