Use the following information to answer questions 49-51.

For exercise, Jill and Matt run on a 400-meter-long oval track. Jill and Matt each run 10 laps daily and both run in the same lane.

49. One day, Jill and Matt began at the same point, but ran around the track in opposite directions. Jill ran at a constant speed that was 2 meters per second faster than Matt's constant speed. Jill passed Matt for the first time in 40 seconds. Jill ran at a constant rate of how many meters per second?

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

Assume the speed of J is x, the speed of M is x-2, and one lap is 400 meters, then 40(x+x-2)=400, the solution is x=6, so choose C