cone area

[BIGTOSH 10+ year member]

anyone tell me the aprox cone area on each size sub 10" 12" 15' 18"

Click to read more...

 

[Scoobydoo 5,000+ posts]

10" = 78.50

12" = 113.04

15" = 176.63

18" = 254.34

 

[dadydolas 10+ year member]

how does one 18 have more cone area than 2 10's and 12's?

 

[Scoobydoo 5,000+ posts]

cause it is area, not diameter

 

[dadydolas 10+ year member]

do u know a link to the formula, not doubting u

i would just like to know how to calculate it

 

[Scoobydoo 5,000+ posts]

pi r squared

 

[Scoobydoo 5,000+ posts]

10"

3.14 x 25 = 78.5

18"

3.14 x 81 = 254.34

 

[BIGTOSH 10+ year member]

10" = 78.50 12" = 113.04

15" = 176.63

18" = 254.34

thanks for the imfo, gonna replace 2 10's wth 15