A marathon race is 42 195 m in length. The world record in 2016 was 2 hrs,
2 mins and 57 seconds held by Dennis Kimetto of Kenya.
a) How many seconds in total did Kimetto take to complete the race?
b) Calculate his average speed in m/s for the race, giving your answer to 2 decimal places.
c) What average speed would the runner need to maintain to complete the marathon in under two hours?
Please help
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0
Answer:
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Answered by
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Answer:
Step-by-step explanation:
1 Minute = 60 Sec
1 Hour = 60*60 = 3600 sec
a) 2Hr, 2 Min, 57 sec = 7200+120+57 = 7377 Seconds
Speed = Distance/ Time
Distance = 42195m
Time = 7377 s
b) Speed = 42195/7377 = 5.7198 m/s
c) To complete under 2 hrs (7200Sec)
Speed needed = 42195/ 7200
= 5.86042 m/s
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