SOLUTION: Melanie left NYC travelling 78 mph. Nancy, to catch up, left some time later
driving at 87 mph. Nancy caught up after 5 hours. How long was
Melanie driving before Nancy caught u
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-> SOLUTION: Melanie left NYC travelling 78 mph. Nancy, to catch up, left some time later
driving at 87 mph. Nancy caught up after 5 hours. How long was
Melanie driving before Nancy caught u
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Question 1125733: Melanie left NYC travelling 78 mph. Nancy, to catch up, left some time later
driving at 87 mph. Nancy caught up after 5 hours. How long was
Melanie driving before Nancy caught up?
You can put this solution on YOUR website! Let = Melanie痴 head start in miles = distance Nancy travels
Until she catches up with Melanie
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Melanie痴 equation:
(1)
(1)
(1)
Melanie痴 time to travel is: hrs
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Check the math
From the start till the catching up moment Nancy traveled 5*87 = 435 miles.
Melanie traveled the same distance, and her way consisted of two parts:
a) head -start distance, and
b) 5*78 = 390 miles.
Hence, Melanie's head-start was 435 - 390 = 45 miles.
To cover this distance of 45 miles, Melanie took = of an hour =~ 0.5769 of an hour =~ 34.6 minutes.
Solved.
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The solution by @josmiceli is correct.
The solution by @josgarithmetic is T O T A L L Y W R O N G.