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# If an athelete ran the first half of a 200 meter race in 10

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CEO
Joined: 21 Jan 2007
Posts: 2764
Location: New York City
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Kudos [?]: 355 [0], given: 4

If an athelete ran the first half of a 200 meter race in 10 [#permalink]  30 Oct 2007, 06:29
If an athelete ran the first half of a 200 meter race in 10 seconds and the second half in 12 seconds, by how much was his average speed over the first half bigger than that over the second?

2 kmh
3 kmh
3.6 kmh
6 kmh
7.2 kmh
Current Student
Joined: 31 Aug 2007
Posts: 371
Followers: 1

Kudos [?]: 56 [0], given: 1

looks like D to me...don't forget to convert m->km and s->hr
Manager
Joined: 25 Apr 2007
Posts: 50
Followers: 1

Kudos [?]: 2 [0], given: 0

100 m in 10 sec = 36 kmph
100 m in 12 sec = 30 kmph

Ans D
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