Question 673759
{{{volume = k *(temperature/Pressure)}}}
Plug in the value given as the first part of the problem.
Then solve to find k
{{{20 = k *(100/15) }}}
{{{20 * 15/100 = k}}}
{{{3 = k}}}

so
{{{volume = 3 * (temperature/pressure)}}}
Use that to solve for the second volume
{{{volume = 3 * (150/20)}}}
{{{volume = 22.5}}} cubic meters