Ответ:
7 см
Объяснение:
L=38 см H/h=0.36 F=?
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H/h=f/d=0.36
f=0.36*d
L=f+d=0.36*d+d=1.36*d
d=L/1.36=38/1.36≈28 см
f=0.36*28≈10 см
1/F=1/d+1/f
F=d*f/(d+f)=28*10/(28+10)=7 см
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Verified answer
Ответ:
7 см
Объяснение:
L=38 см H/h=0.36 F=?
===
H/h=f/d=0.36
f=0.36*d
L=f+d=0.36*d+d=1.36*d
d=L/1.36=38/1.36≈28 см
f=0.36*28≈10 см
1/F=1/d+1/f
F=d*f/(d+f)=28*10/(28+10)=7 см
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