The circles of same radius 13 cm intersect each other at A and B. If AB = 10 cm, then the distance between their centres is:
Given, AB = 10 cm
AB is the common chord for both the circles and OD will be the perpendicular bisector of AB.
$$\Rightarrow$$ AE = EB = 5 cm
In $$\triangle\ $$AOE,
OE$$^2$$ + AE$$^2$$ = OA$$^2$$
$$\Rightarrow$$ Â OE$$^2$$ +Â 5$$^2$$ =Â 13$$^2$$
$$\Rightarrow$$ Â OE$$^2$$ + 25 = 169
$$\Rightarrow$$Â OE$$^2$$ = 144
$$\Rightarrow$$Â OE = 12 cm
Similarly, in $$\triangle$$AED
ED = 12 cm
$$\therefore\ $$Distance between the centres of the circles = OD = OE + ED = 12 + 12 = 24 cm
Hence, the correct answer is Option C
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