Answer:
The mass of the water on earth is 
Explanation:
Given that,
Average depth h= 0.95 mi



Radius of earth 
Density = 1000 kg/m³
We need to calculate the area of surface
Using formula of area

Put the value into the formula


We need to calculate the volume of earth

Put the value into the formula


Now, 70 % volume of the total volume


We need to calculate the mass of the water on earth
Using formula of density


Put the value into the formula


Hence, The mass of the water on earth is 