<PRE><B>Question 1148683</B>
&lt;br&gt;
The trip going took 60 minutes; the trip returning took 70 minutes.  The ratio of the two times is 60:70 = 6:7.&lt;br&gt;
Since the distance were the same, the ratio of speeds is 7:6.  So&lt;br&gt;
{{{7/6 = 350/x}}}&lt;br&gt;
x = 300&lt;br&gt;
The speeds with and against the wind are 350km/hr and 300km/hr.&lt;br&gt;
The speed of the plane is halfway between 300 and 350km/hr -- 325km/hr.&lt;br&gt;
The speed of the wind is the difference between 325km/hr and 300km/hr (or between 325km/hr and 350km/hr) -- 25km/hr.&lt;br&gt;

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