Question

Antonio is on the track team. He ran the 400-meter dash in 1 minute and 20 seconds. The graph shows his performance on the 400-meter hurdles. How much faster was his average speed in the 400-meter dash?

Answer 1

5/3 m/s

Explanation:

Antonio's speed in the 400 m dash was ...

(400 m)/(80 s) = 5 m/s

Antonio's speed in the hurdles was ...

(400 m)/(120 s) = 3 1/3 m/s

His speed in the dash was ...

(5 -3 1/3) m/s = 1 2/3 m/s = 5/3 m/s

faster than in the hurdles.