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In a circle with centre O, PQR is a tang...

In a circle with centre O, PQR is a tangent at the point Q on it. AB is a chord in the circle parallel to the tangent such that `angle BQR= 70^@`. What is the measure of `angle AQB` ?
केंद्र O वाले एक वत्त में, PQR इस पर स्थित बिंदु Q पर एक स्पर्श रेखा है | AB वृत्त में एक जीवा है जो स्पर्श रेखा से इस प्रकार समानांतर है कि `angle BQR= 70^@` है | `angle AQB` का मान ज्ञात करें |

A

`40^@`

B

`60^@`

C

`55^@`

D

`35^@`

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