Question

A block of iron sinks in fluid A but floats in another fluid B. What does this tell us about the densities of the fluids?

• A. Density of fluid A > Density of fluid B
• B. Density of fluid A = Density of fluid B
• C. Density of fluid A < Density of fluid B
• D. Can’t be determined

Answer 1

The correct option is C

Density of fluid A < Density of fluid B

We know that the sinking and floating of a body in a liquid is due to the difference in their densities. If the density of the body is greater than the liquid in which it is immersed then it sinks and vice-versa. So, density of fluid B must be greater than iron and thus also greater than water.