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Two chords, AB and CD of circle meet at ...

Two chords, AB and CD of circle meet at a point O, outside the circle. It is given that AB = 7 cm, CD = 4 cm, OB = 5 cm. What is the length of OD?
एक वृत्त की दो जीवाएं AB और CD किसी बिंदु O पर मिलती हैं जो वृत्त के बाहर है | यह दिया गया है कि AB = 7 सेमी, CD = 4 सेमी, OB = 5 सेमी है | OD की लंबाई क्या है ?

A

5 cm

B

6 cm

C

7.5 cm

D

10 cm

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Chords AB and CD of a circle intersect at a point P inside the circle. If AB = 10 cm, AP = 4 cm and PC = 5 cm, then CD is equal to:

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