P can give Q a start of 20 seconds in a kilometer race. P : PS Archive
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# P can give Q a start of 20 seconds in a kilometer race. P

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VP
Joined: 30 Sep 2004
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Location: Germany
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P can give Q a start of 20 seconds in a kilometer race. P [#permalink]

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23 May 2005, 08:09
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P can give Q a start of 20 seconds in a kilometer race. P can give R a start of 200 meters in the same kilometer race. And Q can give R a start of 20 seconds in the same kilometer race. How long does P take to run the kilometer?

(1) 200 seconds
(2) 240 seconds
(3) 160 seconds
(4) 140 seconds
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Senior Manager
Joined: 17 Apr 2005
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Location: India
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Kudos [?]: 27 [0], given: 0

Re: PS - Run [#permalink]

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23 May 2005, 10:40
christoph wrote:
P can give Q a start of 20 seconds in a kilometer race. P can give R a start of 200 meters in the same kilometer race. And Q can give R a start of 20 seconds in the same kilometer race. How long does P take to run the kilometer?

(1) 200 seconds
(2) 240 seconds
(3) 160 seconds
(4) 140 seconds

160 seconds.

From the stem P gives R a start of 40 seconds or 200 m. i.e R takes 40 seconds to cover 200 m @ 5m/s.

So R takes 200 seconds to complete the race, as P gives R a start of 40 seconds he completes it in 200 - 40 = 160 seconds.

HMTG
VP
Joined: 30 Sep 2004
Posts: 1488
Location: Germany
Followers: 6

Kudos [?]: 327 [0], given: 0

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23 May 2005, 23:47
all of you are right...
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If your mind can conceive it and your heart can believe it, have faith that you can achieve it.

23 May 2005, 23:47
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# P can give Q a start of 20 seconds in a kilometer race. P

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