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FIVE CIRCLES C1 C2 C3 C4 AND C5 WITH RADII R1 R2 R3 R4 R5 REPECTIVELY (R1 < R2 < R3 < R4 < R5 ) BE SUCH THAT CI AND CI+1 TOUCH EACH OTHER EXTERNALLY FOR ALL I=1,2,3,4.IF ALL THE FIVE CIRCLES TOUCH EACH OF THE TWO STRAIGHT LINES L1 AND L2 AND R1 =2 AND R5 =32 THEN R3 IS EQUAL TO(A) 8(B) 17(C) 64/17(D) NONE OF THESE

shaurya sinha , 15 Years ago
Grade 12
anser 1 Answers
Badiuddin askIITians.ismu Expert

Last Activity: 15 Years ago

Dear shaurya sinha

circle touches next circle externally and also two lines

draw digram

you will easly get that radius of circles are in GP

given

R1 =2 and   R5  = 32

so common ratio  =2

R3 = 2*22

     =8

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