The distance between the centres of two equal circles each of radius 3 cm is 10 cm. The length of a transverse common tangent is |
A) 4 cm
B) 6 cm
C) 8 cm
D) 10 cm
Correct Answer: C
Solution :
Length of transverse common tangent |
\[=\sqrt{{{(OO')}^{2}}-{{({{r}_{1}}+{{r}_{2}})}^{2}}}=\sqrt{{{10}^{2}}-{{(3+3)}^{2}}}=8\,cm\] |
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