1.

The length of an are of a circle is given by the formula `l=(x)/(360^(@))xx2pir`. Make r as the subject of the formula.A. `r=(720^(@)pix)/(l)`B. `r=(180^(@)l)/(pix)`C. `r=(720^(@)l)/(pix)`D. `r=(180^(@)l)/(x)`

Answer» Correct Answer - B
Given: `l=(x)/(360^(@))xx2pir`
`rArr lxx360^(@)=x xx 2pir`
`rArr(360^(@)l)/(2pix)=r`
`rArr r=(180^(@))/(pix)`
Hence, the correct option is ((b).


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