RRB Junior Engineer Stage 1 Model Papers 5

Question : 18 of 100

Marks: +1, -0

R and r are the radius of two circles

(R > r)

. If the distance between the centre of the two circles be d, then length of common tangent of two circles is:

Solution:

Length of common tangent

=√{d^2-(R-r)^2}

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