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shaurya sinha Grade: 12
        

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


7 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

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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Badiuddin

7 years ago
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