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GEOMETRY. PLEASE HELP ​

GEOMETRY. PLEASE HELP ​-example-1
User SRKX
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Answer:

Here, Diameter of the whole tube = 10 m

Diameter of the inner tube= 10mm - 2 mm= 8mm

Now,

Area of the shaded region =1/4 ×πd^2

=1/4×3.14×8^2

=50.24 mm^2

User Figurine
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