Question

answer all three question 8,9,10 see photo
8.
Two liquids of density 3 kg/m3 and 4kg/m3
are mixed together.
If their masses are equal then the density of mixture
is
kg/m3
VA
24
7
7
(1)
(2)
(3)
(4)
VIN
7
24
2
9.
In the above question, if their volumes are equal the
density of mixture is
kg/m
7.
7
2
(1)
24
7
(2)
(3)
(4)
24
2
7
10. In question no. 8, if the ratio of masses is 1 : 2 then the
value of the density of mixture is kg/m²
5
18
(1)
(2)
(3)
9
5
(4)
18
5​

Answer 1

Answer:

B/A = A/ (A+B)

→Assume, B = Ax (B is some percent of A. So consider that some percent as ‘x’.)

→Ax/A = A/(A+Ax)

→X=1/(1+x)

→X^2+ X -1 = 0

→Solving the above equation, we get 0.62(consider only positive terms),

So the answer is 62%.