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Sagot :
One km^3 is 1,000,000,000 m^3=10^9 m^3 hence 3.73 10^8 km^3 is 3.73 10^17 m^3
One meter is 3.28084 feet hence 1 m^3 is (3.28084)^3 feet
Thus 3.73 10^8 km^3 is 3.73*35.315 10^17 = 132 cubic feet
One meter is 3.28084 feet hence 1 m^3 is (3.28084)^3 feet
Thus 3.73 10^8 km^3 is 3.73*35.315 10^17 = 132 cubic feet
The total amount of fresh water on earth is [tex]3.73 *10^{8} km^3[/tex]
Hence the volume of water [tex]v= 3.73*10^{8} km^{3}[/tex]
we are asked to convert this into cubic metre and cubic feet.
we know that 1 km = 1000 m.
[tex]1 km^3 = [10^3 m]^3[/tex]
[tex]1 km^3 = 10^{9} m^{3}[/tex]
we have been given [tex]v = 3.73 *10^{8} km^3[/tex]
[tex]v = 3.73 *10^{8} *10^{9} m^{3}[/tex]
[tex]v = 3.73*10^{17} m^{3}[/tex] [ANS]
Now we have to convert it into cubic feet
we know that one metre = 3.28083 feet
[tex]1 m^{3} =[3.28083feet]^{3}[/tex]
[tex]1 m^{3} =35.3143472 feet^{3}[/tex]
Hence [tex]v =3.73*10^{17} m^{3}[/tex]
[tex]= 3.73*10^{17} *35.3143472 feet^{3}[/tex]
⇒ [tex]v = 131.7225*10^{17} feet^{3}[/tex] [ANS]
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