Question 1207797
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        My approach to such problems is  " solve as simple as it is possible ".

        If there is a simplest way,  it is preferable.


        This problem can be solved arithmetically,  without using fractions and without using equations.

        It is a good exercise to develop skills on counting and to develop common sense.



<pre>
A constant rate 0.2 liter per second means 1 (one) liter in 5 seconds.


So, the time to empty this tank is 360*5 = 1800 seconds.


To get minutes, divide 1800 seconds by 60 seconds, because 1 minute is 60 seconds.


<U>ANSWER</U>.  1800/60 = 180/6 = 30 minutes.
</pre>

Solved.