The distance between the centres, of two equal circles each of radius 4 cm is 17 cm. The length of a transverse tangent is:

Solution (By Examveda Team)

Let the length of a transverse tangent = x

$$\eqalign{ & = \sqrt {{a^2} - {{\left( {{r_1} + {r_2}} \right)}^2}} \cr & = \sqrt {289 - 64} \cr & = \sqrt {225} \cr & = 15{\text{ cm}} \cr} $$