Question 320695
Rate*Time=Distance.
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Train 1 has already traveled 1 hour or 35 miles.
{{{D1=35*t+35}}}
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{{{D2=40*t}}}
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The trains meet when {{{D1=D2}}}
{{{35*t+35=40*t}}}
{{{5t=35}}}
{{{t=7}}}hr
Use either equation for distance to calculate the distance once they meet.
{{{D2=40*t=40*7=280}}}km