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In the figure, O is the centre of the circle of radius 29 cm, `OP bot AB, OQ bot CD` and AB is parallel to CD. If AB = 40 cm and CD = 42 cm, then the length of PQ is:
दी गयी आकृति में, O वृत्त का केंद्र है जिसकी त्रिज्या 29 सेमी है ,`OP bot AB, OQ bot CD` और AB, CD के समान्तर है। यदि AB= 40 सेमी और CD = 42 सेमी है, तो PQ की लंबाई है

A

32

B

20

C

41

D

21

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In the figure, chords AB and CD of a circle intersect externally at P. If AB = 4cm, CD =11cm and PD=15cm, then the length of PB is: दी गयी आकृति में, जीवा AB और CD एक वृत्त को बाहरी रूप से P पर काटते हैं। यदि AB = 4cm, CD =11 cm और PD = 15cm है, तो PB की लंबाई ज्ञात करे |

In the given figure,chords AB and CD of a circle intersect externally at P. AB=4 cm,CD=11 cm and PD=15 cm,then the length of PB is:

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