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In a circle of radius 10 cm and centre O...

In a circle of radius 10 cm and centre O, PQ and PR are two equal chords , each of length 12 cm. What is the length (in cm) of chord QR?
केंद्र O तथा त्रिज्या 10सेमी वाले वृत्त में, PQ और PR दो बराबर जीवाएं हैं जिनमें से प्रत्येक की लंबाई 12 सेमी है | जीवा QR की लंबाई क्या है ?

A

a)18.6

B

b)20.4

C

c)18.4

D

d)19.2

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