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You run 100 meters in 15 seconds, 400 meters in 1 minute, and 800 meters in 2 minutes....

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zero0master | Student, Grade 9 | eNoter

Posted November 6, 2008 at 3:50 AM via web

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You run 100 meters in 15 seconds, 400 meters in 1 minute, and 800 meters in 2 minutes.

How long will it take you to run 1 kilometer if you continue running at the same speed? (Hint: 1 kilometer equals 1000 meters)

Tagged with math, rate, speed

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melony82 | High School Teacher | (Level 1) Associate Educator

Posted November 6, 2008 at 4:07 AM (Answer #1)

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The rate this individual is running is 100m per 15 seconds (distance/time).  So, in order to run 1,000m, or 1 kilometer, it would take 150 seconds (15seconds x 10).  150 seconds is equal to 2.5 minutes (150 seconds divided by 60 seconds).

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vedhajothi | Student , Undergraduate | eNotes Newbie

Posted July 5, 2009 at 1:33 AM (Answer #2)

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it requires 2 minutes to complete 800 m. then an another 30 seconds to finish off 200 m. so 2 min 30 seconds will be required to finish off 1km.

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revolution | College Teacher | Valedictorian

Posted July 4, 2010 at 11:15 PM (Answer #3)

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15 seconds = 100m

You know that 1km equals 1000m

so, 15*10 seconds= 1000m

150 seconds = 1000 metres

Change the seconds to minutes, which is 150/60= 2.5 minutes

I will take 2.5 min to run 1km (1000m) if continuing at same speed of 400m/min

 

 

 

 

 

 

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