two concentric circles are of radii 10cm and 8cm.RP and RQ are tangents to the two circles from R. If the length of RP is 24cm find the length of RQ.................Any1 plzzz answr dis ques fast

Let the circles have common centre O.

Let RP n RQbe d tangents to the larger n smaller circle respectively.

Join OP, OQ, OR.

By Pythagoras Theorem,

OR2= OP2+PR2

OR2= 102+242



In right triangle OQR,


= 262-82


RQ=sq. root 612= 6 root 17


  • 30
What are you looking for?