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प्रश्न
If two circles having centers P and Q and radii 3 cm and 5 cm. touch each other externally, find the distance PQ.
एक पंक्ति में उत्तर
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उत्तर
If two circles touch externally, then the distance between their centres is sum of their radii.
∴ the distance between their centres = 5 + 3 = 8 cm .
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