Question 1047729

a plane averaging 120mi/h and an express train averaging 60 mi/h depart at the same time from the same city headed for the same destination. if the train arrives 45 min later than the plane, how far did they both travel?
<pre>Let distance be D
Then we get: {{{D/60 = D/120 + 45/60}}}
{{{D/60 = D/120 + 3/4}}}
2D = D + 90 -------- Multiplying by LCD, 120
2D – D = 90
D, or distance = {{{highlight_green(matrix(1,2, 90, miles))}}}
See! Nothing to it....nothing COMPLEX!