Odpowiedzi

2010-02-15T15:39:52+01:00
Obw = 20 m = 2000 cm
bok a = x
bok b = 3 x
obw =2*a+2*b
obw = 2x + 2* 3x = 8x
2000cm = 8x
x+2000 : 8
x = 250 cm
bok a = 250 cm
bok b = 3x = 250 cm *3 = 750 cm
Pole = a * b
Pole = 250 * 750 = 187500 cm²