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 Post subject: Help please !
PostPosted: Mon Dec 27, 2010 4:05 pm 
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Joined: Tue Oct 21, 2008 9:36 pm
Posts: 77
Can anyone help with the following questions please

3 ducks have a race
Duck a finishes 38 seconds ahead of duck b who finishes 17 seconds behind duck c.
How many seconds is duck a ahead of duck c

taken from habs 2008

answers gratefully recieved !


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 Post subject: Re: Help please !
PostPosted: Mon Dec 27, 2010 4:16 pm 
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Joined: Tue Oct 20, 2009 4:04 pm
Posts: 1055
21 seconds.


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 Post subject: Re: Help please !
PostPosted: Mon Dec 27, 2010 4:24 pm 
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Joined: Fri Sep 15, 2006 8:51 am
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they finish in the order a - c - b

a finished then 21 seconds later c finishes then 17 seconds later b finishes


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 Post subject: Re: Help please !
PostPosted: Wed Dec 29, 2010 9:02 am 
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Joined: Thu Sep 30, 2010 8:03 am
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duck a finishes first and b finishes last (since it is behined c)
we know the time between a and b is 38 seconds and we also know that between c and b is 17 seconds
therefore 38-17=21 seconds


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 Post subject: Re: Help please !
PostPosted: Wed Dec 29, 2010 9:06 am 
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Joined: Mon Jun 18, 2007 2:32 pm
Posts: 6962
Location: East Kent
with this type of question I always draw a diagram


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 Post subject: Re: Help please !
PostPosted: Thu Dec 30, 2010 1:18 pm 
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Joined: Tue Oct 21, 2008 9:36 pm
Posts: 77
many thanks for all your replies

wishing everyone a happy new year


ritz667


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