1.

Two circles of unequal radii have four common tangents. A transverse common tangent meets the direct common tangents at the points P & Q. If length of direct tangent (between the point of contacts) is 8 then length of PQ is

Answer»


SOLUTION :`PA=PR=8-a`
So `PQ=8-a+b`
ALSO `QD=QR=8-b`
So `QP=8-b+a`
`8-a+b=8-b+a`
`impliesa=b`
`PQ=8`


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