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July 29, 2014

July 29, 2014

Posted by **Kelsie** on Monday, April 20, 2009 at 5:29pm.

I have to use a proportion to solve this.

- Algebra -
**drwls**, Monday, April 20, 2009 at 5:47pmThe proportion can be the speed: 9/4 = 2.25 m/s for Bernie and 20.00 m/s for Barnaby.

The distance from the starting line at time t after the start is

X1 (Barnaby) = 10 + 2 t

X2 (Benie) = 2.25 t

Bernie passes Barnaby when X1 = X2. Solve for the X where that happens.

10 + 2t = 2.25 t

10 = 0.25 t

t = 40 seconds

X1 = X2 = 90 m

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