Question

It is easier for humans to swim in sea water than in river water as :
(a) the density of sea water is less than that of the river water.
(b) the density of sea water is more than that of river water.
(c) the sea is big in comparison to the river.
(d) None of the above

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Answer

(b) the density of sea water is more than that of river water

Reason — It is easier to swim in sea water because the density of sea water is more than that of the river water, so our weight is balanced in sea water with less part of the body submerged inside it.

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