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PetruDG
@PetruDG
July 2022
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Есть 2 водносолевых раствора первый раствор содержит 25% а второй 40% соли Сколько килограммов каждого раствора надо взять чтобы получить раствор массой 50 килограмм содержащий 34% соли
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AndrewBal
K1 = 25% = 0.25
k2 = 40% = 0.4
m3 = 50kg
k3 = 34% = 0.34
m1,m2 - ?
==============
k1*m1+k2*m2=k3(m1+m2)
0.25m1+0.4m2=0.34*50
m1=50-m2
0.25(50-m2)+0.4m2=17
12.5-0.25m2+0.4m2=17
0.15m2=4.5
m2=30
m1=20
1 votes
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Answers & Comments
k2 = 40% = 0.4
m3 = 50kg
k3 = 34% = 0.34
m1,m2 - ?
==============
k1*m1+k2*m2=k3(m1+m2)
0.25m1+0.4m2=0.34*50
m1=50-m2
0.25(50-m2)+0.4m2=17
12.5-0.25m2+0.4m2=17
0.15m2=4.5
m2=30
m1=20