Question 300378
I'm not sure how you figure it out in your head without an equation???
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Let the plane speed be S and the wind speed be W.
Remember rate multipled by time equals distance.
Against the wind,
1.{{{(S-W)6=1800}}}
2.{{{(S+W)5=1800}}}
You can simplify each equation.
1.{{{S-W=300}}}
2.{{{S+W=360}}}
Add the two equations together to get rid of W.
{{{2S=660}}}
{{{highlight_green( S=330)}}}
Then from eq. 2,
{{{330+W=360}}}
{{{highlight_green( W=30)}}}