Răspuns :
Cutia=masa cutii-masa pateului=7/20-3/10
Amplifici a doua fractie cu 2 =>
=> 7/20-6/20=1/20 kg
Amplifici a doua fractie cu 2 =>
=> 7/20-6/20=1/20 kg
Cutia=masa cutii-masa pateului=7/20-3/10
Amplifici a doua fractie cu 2⇒ 7/20-6/20=1/20 kg
Amplifici a doua fractie cu 2⇒ 7/20-6/20=1/20 kg