Question 2190
Let the distance between
terminal & Ocean resort       =  x Kms.

time taken from terminal
to ocean resort at 90 Kms/h   =  {{{x/90}}} Hrs. (Because Speed * time = Distance)

time taken from ocean resort
to terminal at 72 Kms/h       =  {{{x/72}}} Hrs.

so total hours taken for 
round trip travel             =  {{{x/90}}} + {{{x/72}}} = 9 Hrs.
(taking out the LCM, we get)
{{{(4x+5x)/360}}}  =  9

= {{{9x/360}}}     =  9

=  {{{x/40}}}  = 9

so  x = 9 * 40 = 360

so, the distance between the terminal 
and the ocean resort                 =  360 Kms.    Ans.