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- I have been clocked at 70 miles per hour and the world's fastest human has been clocked
at 27.89 miles per hour. If I give that human a 60m lead in a 100m dash, what will be the result?
- A) Anita wins by less than 1 meter
- B) Anita wins by more than 1 meter
- C) Man wins by less than 1 meter
- D) Man wins by more than 1 meter
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Solution:
GIVEN
1 mile = 1609.344m
1 hour = 3600 sec
ASSUME
Both man and Anita can hold their top speeds for the entire race
Man: 27.89mi/hr x 1609.334m/mi x 1hr/3600sec = 12.46787 m/sec
Time for man to run 40m
40m/12.46787m/sec=3.208246sec
Anita: 70mi/hr x 1609.334 m/mi x
1hr/3600sec = 31.29261m/sec
Time for Anita to run 100m
100m/31.29261m/sec=3.195643sec
The Winner
Anita wins by 3.208246-3.195643 = 0.012603 sec
Winning distance 0.012603 sec x 31.29261m/sec = 0.394381m which is less than 1 meter
(Answer A)
Contest winners
10 & Under George Mitchell
Sacramento, CA
11-15 Alice Snyder
Boulder, CO
16-25 Jean Johnson
Lawnside, NJ
26-50 Jason Henne
Boston, MA
50+ Maria Alverez
Washington, DC
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