Observe the given figure. The distance between the two centers AB is
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Correct answer: C
Explanation
The correct answer is Option 3 i.e. 13 cm.
Concept:
Direct common tangent = √(distance between the two centers2 - (r1 - r2)2
Distance between the two centers is = x cm
As per the formula,
⇒ 122 = (d2 - (8 - 3)2
⇒ 144 = d2 - 25
⇒ d2 = 169
⇒ d = √169
⇒ d = 13