Răspunsuri

2014-04-26T14:24:08+03:00
X-masa de apa
y-masa de petrol
x-25=y
x=25+y
 ρ=m/v
V=m*ρ
V=x*1g/cm³
V=x dm³=  25+y dm³

V=y*0,8g/cm³=  y* 0,8 dm³

y* 0,8=25+y
y*0,,8-y=-25
y(0,8-1)=-25
y*(-0,2)=-25
y= -25/-0,2
y=125g
x=125+25=150g
V=125*0,8=100 dm³


Mrs mult (răspunsul tău e cel corect
Care rsp este corect?