speed distance time word problem  TOPIC_SOLVED

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speed distance time word problem

Postby geet on Thu Feb 02, 2012 1:47 pm

Distance betw NY and Paris is 315miles. Ra and Pa leave NY at same time. However Pa arrives in Paris 1hr 10mins before Ra with an avg speed that was 9 miles per hr faster. how fast was each traveling ?
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Re: speed distance time word problem  TOPIC_SOLVED

Postby theshadow on Thu Feb 02, 2012 7:09 pm

geet wrote:Distance betw NY and Paris is 315miles. Ra and Pa leave NY at same time. However Pa arrives in Paris 1hr 10mins before Ra with an avg speed that was 9 miles per hr faster. how fast was each traveling ?

you can see how to set this up here. Since they give Pa's speed in terms of Ra's speed, pick a variable for Ra's speed and then do an expression for Pa's speed. Go from there, using d=rt w/ d=315 and the stuff you just did for r.
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