If the arc of the same length in two cir...

If the arc of the same length in two circles subtend angles `75^(@)` and `120^(o)` at the centre, find the ratio of their radii.

A

`8 : 5`

B

`7 : 5`

C

`8 : 7`

D

`3 : 5`

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The correct Answer is:

A

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