Thursday

December 18, 2014

December 18, 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

**Answer this Question**

**Related Questions**

math - Perry and Barry ran an 120-meter race. When Barry crossed the finish line...

trig. - Jack and Jill ran a 400 meter race. Jill ran therace in 50 second and ...

math - jim ran the 400-meter dash in 47 seconds. if he ran at a constant rate, ...

gallegos - "Robert can swim the first 50 meters of a race in 1 minute. Then he ...

gallegos - "Robert can swim the first 50 meters of a race in 1 minute. Then he ...

math - Four runners ran the relay, Bill ran his lap in 22.738 seconds, Troy ran ...

math - michelle runs 400 meters in 1 minute. if she completes in the 100-meter ...

Math - Jill and Matt run on a 400-meter-long oval track. They each run 10 laps ...

physics - A race car completes the final lap of a race on a 2-kilometer circular...

Physics - A race car completes the final lap of a race on a 2-kilometer circular...