# algebra

posted by Hannah

Jet #1 leaves an airport at 600 km/h. Jet #2 leaves 3/4 hour after jet #1 in same direction. How long until jet #2 overtakes jet #1

1. Steve

Unless #2 is faster than #1, it will never overtake it.

In the 45 minutes #2 has been waiting, #1 has gone 450 km.

So, if #2 is x km/hr faster than #1, it will overtake #1 in 450/x hours

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