2000 Tegla Loroupe 20000 meter 1:05:26.6 mi/h
The world record for the women’s outdoor 20,000 meter run,
set in 2000 by Tegla Loroupe, is 1:05:26.6
(seconds are given to the nearest tenth).
What was her average speed, expressed in miles per hour
with the correct number of significant figures?
(Assume that the race distance is accurate to 5 significant figures.)
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▶ 참고: 환산 인자
[ https://ywpop.tistory.com/3121 ]
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▶ 환산 인자
> 1 mi = 1609.344 m (exactly, 정확한 값)
> 1 h = 3600 s
1:05:26.6
= 3600 + 300 + 26.6
= 3926.6 s
(20000 m / 3926.6 s) (1 mi / 1609.344 m) (3600 s / 1 h)
= (20000 / 3926.6) (1 / 1609.344) (3600)
= 11.393756899...
= 11.394 mi/h
답: 11.394 mi/h
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