There are about 6*10^24 molecules in a litre of water. It is estimated that a person drinks about 2. 2 *10^3 litres of water a year. How many molecules of water does a person drink in a year?



Answer :

A person drinks 13.2 x [tex]10^{27}[/tex] molecules of water in a year

The branch of mathematics that aids in the representation of problems or situations through mathematical expressions is called Algebra

Given that

Number of molecules in a liter of water = 6 x [tex]10^{24}[/tex]

A person drinks water in a year = 2.2 x [tex]10^{3}[/tex]

Do we have to find the number of molecules a person drinks in a year =?

Now let us consider

X = number of molecules a person drinks in a year

1 litre of water = 6 x [tex]10^{24}[/tex] molecules

2.2 x [tex]10^{3}[/tex] = X

X = 6 x [tex]10^{24}[/tex] x 2.2 x [tex]10^{3}[/tex]

X= 13.2 x [tex]10^{27}[/tex]

Therefore 13.2 x [tex]10^{27}[/tex] molecules of water a person drinks in a year

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