SOLUTION: John and Tony start from Grays lake at the same time and head for a town 10 miles away. John walks twice as fast as Tony and arrives 3 hours before Tony. Find how fast each walks
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Question 179137: John and Tony start from Grays lake at the same time and head for a town 10 miles away. John walks twice as fast as Tony and arrives 3 hours before Tony. Find how fast each walks?
This doesn't seem like it has enough information to be solved, but thats not true as there is a correct answer, I'm just not sure how to create the chart in the proper format to get the right answer.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
John and Tony start from Grays lake at the same time and head for a town 10 miles away. John walks twice as fast as Tony and arrives 3 hours before Tony. Find how fast each walks?
:
I don't why you need a chart for this:
:
Let s = Tony's speed
then
2s = John's speed
:
Write a time equation: Time =
:
Tony's time - John's time = 3
- = 3
Multiply eq by 2s
2(10) - 10 = 3(2s)
20 - 10 = 6s
s =
s = 1 mph is Tony's speed
and
2 * 1 = 3 mph is John's speed
:
:
Check solution using decimals
10/1.67 = 6,00
10/3.33 = 3.00
----------------
differ = 3.00
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