65. It is easier for a man to swim in sea water, than in river water because A.The density of sea water is lesser than the density of river water B.The density of sea water is more than the density of river water C.The sea is-deeper than the river D.The sea is wider than the river
Option B Solution: It is easier for a man to swim in sea water, than in river water because sea water contains more amount of salt as compared to river/fresh water as a result its density increases and hence the buoyant force increases which makes it easier to swim in sea water.
