Odpowiedzi

2010-04-06T15:09:25+02:00
D₁= 12¹/₃
d2= 75% × 12¹/₃ = 9¼

P= ½ ×d₁×d₂
P=½×12¹/₃×9¼
P=114¹/₁₂
2010-04-06T15:10:28+02:00
D₁=12⅓=37/3
75%=75/100=3/4
d₂=(3/4)*d₁=(3/4)*(37/3)=37/4=9¼

P=(d₁*d₂):2=(37/3)*(37/4)*(1/2)=(37*37*1):(3*4*2)=1369:24=57 i 1/24 [cm^2]
2010-04-06T15:12:19+02:00
E=12⅓

f=0,75e
f=0,75×12⅓
f=9¼

P=12⅓×9¼/2
P≈57