A Sprinter Runs 100

Multiple Choice

A sprinter runs 100.0 m in 9.87 seconds.If he travels at constant acceleration for the first 75.0 m and then at constant velocity for the final 25.0 m,what was his peak velocity?

A) 17.7 m/s.
B) 17.5 m/s.
C) 20.3 m/s.
D) 15.4 m/s.