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kell :2= 240:2= 120
p:l
7:5 jum =120 . 1 tas = 120/12= 10
p= 7×10 = 70
l = 5×10= 50
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2p=×240=140
p=140/2=70cm
2l=×240=100cm
l=100/2=50cm
L=70×50=3500cm²