Five circle- adjacent to each other in ascending order, first dia 8 and last dia 18, find mid one.

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Five circle- adjacent to each other in ascending order, first dia 8 and last dia 18, find mid one...

18-8=10
10/4=2.5
1st circle dia= 8
2nd circle dia= 8+2.5= 10.5
3rd circle dia= 8+ 2.5+ 2.5= 13
4th circle dia= 8+ 2.5+ 2.5+ 2.5= 15.5
5th circle dia= 8+ 2.5+ 2.5+ 2.5+ 2.5= 18

mid circle dia ( 3rd one)= 13

 Is This Answer Correct ? 89 Yes 6 No

Five circle- adjacent to each other in ascending order, first dia 8 and last dia 18, find mid one...

Consider The Que in A.P. and solve An=A+(n-1)*d
An=18, A=8, n=5, So d=2.5 So A3=13

 Is This Answer Correct ? 31 Yes 3 No

Five circle- adjacent to each other in ascending order, first dia 8 and last dia 18, find mid one...

Depends on the type of progression that the diameters increase- AP, GP, Exp........

If they are in an AP, the answer is 13.
If they are in a GP, the answer is 12.

 Is This Answer Correct ? 1 Yes 0 No

Five circle- adjacent to each other in ascending order, first dia 8 and last dia 18, find mid one...

It's 14

 Is This Answer Correct ? 2 Yes 10 No

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