2 planes leave Regin at 10am, one flying west and the other eats. The eastbound plane flies 120km/h faster than the wesbound plane. In 1 1/2 hours that are 1740km apart. Find the speed of each plane.
2007-01-01 12:44:32 · 2 answers · asked by Cutie 4 in Science & Mathematics ➔ Mathematics
(x*1.5)+(x+120)*1.5=1740
x=520
westbound plane travels at 520 km/h
eastbound plave travels at 640km/h
2007-01-01 15:34:09 · answer #1 · answered by jcj7373 2 · 0⤊ 0⤋
First you set some variables:
x: the speed of the westward plane
y: the speed of the eastward plane
Speed is expressed as distance-traveled-per-hour. If you multiply speed times the number of hours, you know how far somebody has traveled.
So the westward plane goes a distance of (x* 1.5)
And the eastward plane goes a distance of (y* 1.5)
See if that helps you.
2007-01-01 16:09:37 · answer #2 · answered by sophist 2 · 0⤊ 0⤋