Two planes leave the same time. One plane flies 300 kph in west and another flies 450kpk in east. How many hrs will they be 2250 km apart?

2
by prizmmy16

2015-09-30T19:25:08+08:00

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It would take 3 hours.
0-0
Hour 1:                       300         -           450
Hour 2:            600                    -                              900
Hour 3:  900                              -                                              1350
1350 + 900 = 2250
Thank you .aregatoguzaimas
2015-09-30T20:40:52+08:00

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Using Linear Equations :)

Let x = be the number of hours the two planes will be 2250 kilometers apart.
300x + 450x = 2250
Simplify
750x = 2250
Divide both sides by 750
750x / 750 = 2250 / 750
x = 3

So they will be 2250km apart in 3 hours.
lol
I take a more heuristic approach.
It's coooooooooooool :D