Question 313601: Every morning, Claude leaves his house to go to work. When he drives at 60 km/h, he gets to work 3 minutes late. When he drives at 80 km/h, he gets to work 15 minutes early. How far is Claude’s house from his work ?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Every morning, Claude leaves his house to go to work. When he drives at 60 km/h, he gets to work 3 minutes late. When he drives at 80 km/h, he gets to work 15 minutes early. How far is Claude’s house from his work ?
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Slower journey DATA:
rate = 60 km/h ; distance = x km ; time = x/60 hrs
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Faster journey DATA:
rate = 80 km/h ; distance = x km ; time = x/80s
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Equation:
slow time - fast time = 18/60 hr
x/60 - x/80 = 18/60
Multiply thru by 240
4x - 3x = 4*18
x = 72 km
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Cheers,
Stan H.
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