Question

71% of earth surface is covered with:
(a) land
(b) water
(c) air
(d) coal

Answer 1

the ans of this question is
the most of the surface is covered with water
so it is called a blue planet

Answer 2

71 % of earth surface is covered with " b " water.

As per the figures of 2003, it is clearly given that 71 % of earth is covered with water.

96.5 % of total available water is in ocean and only 2.5 % is as fresh-water .

70 % of this 2.5 % is in the form of ice-sheets and little less than 30 % is ground water.