There are two equal circles of radius 3 cm each and distance

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There are two equal circles of radius 3 cm each and distance between their centres is 10 cm. The length of one of their transverse common tangents is

1. 7 cm
2. 9 cm
3. 10 cm
4. 8 cm

Correct Option: D

As per the given in question , we draw a figure of two equal circles
Transverse common tangent = √d² - (r₁ + r₂)²
Transverse common tangent = √10² - (3 + 3)²
[ r₁ = r₂ = 3 cm.]
Transverse common tangent = √100 - 36
Transverse common tangent = √64 = 8 cm.