Ответ:
d=30cm
f=15cm
F-?
d-f=F
F=f*d
f+d
F= 0,3m*0,15m
0,15m
F=0.3m
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Ответ:
d=30cm
f=15cm
F-?
d-f=F
F=f*d
f+d
F= 0,3m*0,15m
0,15m
F=0.3m