Question 959928
___________________speed__________time__________distance
WITHWIND___________r+30____________t_____________165
AGAINST____________r-30____________t_____________135


{{{system((r+30)t=165,(r-30)t=135)}}}


{{{t=165/(r+30)=135/(r-30)}}}


{{{165(r-30)=135(r+30)}}}
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