The number of buckets which will contain the water of oceans is required.
The number of buckets that will be required is [tex]7\times 10^{19}[/tex]
Unitary method
Total amount of water held in the oceans = [tex]1.4\times 10^9[/tex] cubic kilometers
Total amount of water in one bucket = 20000 cubic centimeters
The conversion factor of cubic centimeter to cubic kilometer is
[tex]1\ \text{cubic centimeter}=10^{-15}\ \text{cubic kilometer}[/tex]
[tex]20000\ \text{cubic centimeter}=2000\times 10^{-15}\ \text{cubic kilometer}[/tex]
Let n be the number of buckets
[tex]n\times 20000\times 10^{-15}=1.4\times 10^9\\\Rightarrow n=\dfrac{1.4\times 10^{9}}{20000\times 10^{-15}}\\\Rightarrow n=7\times 10^{19}[/tex]
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