Randi ran two laps around a 400m track.She completed the first lap in 50seconds and then decreased her speed by 5% for the second lap.

Find:
A)her speed on the first lap
B)her speed on the second lap
C)her total time for the two laps
D)her average speed for the two laps

2 answers

A. distance = 400 m; time = 50 seconds
distance = rate x time. Solve for rate.

B. distance = 400 m
time for second lap is 50s-0.05(50s) = ?
solve for rate.

C. total time = time for first lap + time for second lap = ?

D. average speed (rate) = total distance/total time.
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