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प्रश्न
The length of an arc of the sector of angle θ° of a circle with radius R is
विकल्प
`(2pi"R"theta)/180`
`(2pi"R"theta)/360`
`(pi"R"^2theta)/180`
`(pi"R"^2theta)/360`
उत्तर
`=(2pi"R"theta)/360`
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