Pls answer it

Dear student,

As you have already ticked the first question and 3rd question is not visible I am assuming your doubt is in the 2nd question.

Solving the 2nd question-

Take the equal volume of A and B, say V.
Weight of A = Weight of V/2 volume of water.
Similarly, the weight of B = Weight of 2V/3 volume of water.
As density is weight per unit volume, the required ratio will be
D(A)/D(B)=(V/2)/(2V/3) =3/4
Thus, the density of A: density of B = 3:4
Hence option C

Hope it helps.
Regards