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If the perimeter of a semicircular protr...

If the perimeter of a semicircular protractor is 66 cm, Find the diameter of the protractor.

Text Solution

Verified by Experts

`Perimeter=2R+piR`
`66=R(pi+2)`
`R=66/(pi+2)`
`R=77/6 cm`
D=2R=77/3cm.
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