Question

Two pieces of different metals, when completely immersed in water, experience equal upthrust, then __________.

• A. both pieces have same density
• B. both pieces have equal volume
• C. both pieces have equal weight in air
• D. None of the above

Answer 1

The correct option is B both pieces have equal volume

As upthrust or buoyancy force depends on density of liquid and volume of substance immersed, the volume should be same for the same upthrust in the common liquid.

$F_{buoyancy}=V{\rho }_{liquid}g$