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In a circle of radius 10 cm, with centre...

In a circle of radius 10 cm, with centre O, PQ and PR are two chords each of length 12 cm. PO intersects chord QR at the points S. The length of OS is :
त्रिज्या 10 सेमी तथा केंद्र O वाले एक वृत्त में, PQ तथा PR दो जीवाएं हैं जिनमें से प्रत्येक की लंबाई 12 सेमी है | PO, जीवा QR को बिंदु S पर काटती है |OS की लंबाई है :

A

a)2.8 cm

B

b)2.5 cm

C

c)3.2 cm

D

d)3 cm

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