Question

The kilopascal is a unit of measure for atmospheric pressure. Suppose the atmospheric air pressure at sea level is about 104 kilopascals. For every​ 1000-m increase in​ altitude, the pressure decreases about 11.9​%. What is the approximate pressure at an altitude of 2000 ​m? The pressure at an altitude of 2000 m is about ___ kilopascals.

Answer 1

`79\ kilopascal`

Explanation:

we know that

For every​ 1000-m increase in​ altitude, the pressure decreases about 11.9​%

so

at an altitude of 2000 ​m, the pressure decreases about 2*11.9​%=23.8%

`100\%-23.8\%=76.2\%=76.2/100=0.762`

therefore

`0.762*104\ kilopascal=79.248\ kilopascal`