Question

Two balls, one of iron and the other of aluminum experience the same upthrust when dipped completely in water if __________.

• A. Both have equal volumes
• B. both have different volume.
• C. both have same mass.
• D. both have same weight in air.

Answer 1

The correct option is A Both have equal volumes

The upthrust experienced by a body is independent of the weight of the body. It depends on the volume of the liquid displaced by the body which is equal to the volume of the body submerged. Here, since both experiences the same upthrust, therefore, both have equal volume.