Problema Solution
Amber ran 100 yards in 12 seconds. What was her speed in miles per hours? Round your answer to the nearest hundredth.
Answer provided by our tutors
Let
d = 100 yd
1 mi = 1760 yd
1 yd = 1/1760 mi
d = 100/1760 mi
t = 12 s
t = 12/60 hr
t = 1/5 hr
The average speed v = d/t that is:
v = (100/1760)/(1/5)
v = 0.28 mph
Amber's average speed in miles per hour was 0.28 mph.