Question

A block of iron sinks in fluid $A$ but floats in another fluid $B$. So, what can we conclude?

• A. Density of fluid $A$ > Density of fluid $B$
• B. Density of fluid $A$ = Density of fluid $B$ = $0$
• C. Density of fluid $A$ < Density of fluid $B$
• D. Density of fluid $A$ = Density of fluid $B$ $\ne 0$

Answer 1

Answer: (C)

Density of fluid $A$ < Density of fluid $B$

Iron floats in a fluid more dense than itself. So, density of fluid $B$ is more than that of iron.
Iron sinks in a fluid less dense than itself. So, density of fluid $A$ is less than that of iron.
From above statements, density of fluid $B$ is more than the density of fluid $A$.