A small circle is drawn in another larger circle such that they do not touch each other. The radius of the larger circle is 13 cm and that of the smaller circle is 7 cm. If the least distance between their circumferences is 2 cm, then the distance between their centres’ is –
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Answer:
radius 1 = 13
radius 2 = 7
distance between their center is r1 + r2 + 2
= 13+7+2
= 22
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