Question

is objects having equal volume have equal upthrust

Answer 1

it also depends on the liquid

Answer 2

✍️ Acceleration due to gravity remaining constant, two objects having same volume as well as the density of the liquid remaining same will experience equal upthrust.

✍️ For example, Two balls one of iron and the other of aluminium experience the same upthrust when dipped completely in water if both have equal volumes. Density of water = 1000 kg/m³