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Question 54790: Can someone help me on this problem?
Ching leaves San Francisco and travels toward Los Angeles at 50 mi/h. An hour later, Phil leaves Los Angeles and travels toward San Francisco at 60 mi/h. If the two cities are 380 miles apart, how many hours will it take for Ching to meet Phil?
Thanks,
Sher
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! Ching leaves San Francisco and travels toward Los Angeles at 50 mi/h. An hour later, Phil leaves Los Angeles and travels toward San Francisco at 60 mi/h. If the two cities are 380 miles apart, how many hours will it take for Ching to meet Phil?
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Let t = no. of hrs till Ching meets Phil
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Let (t-1) = no. of hrs till Phil meets Ching
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Write a distance equation: Dist = speed * time
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Ching's Dist + Phil's Dist = 380
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50t + 60(t-1) = 380; multiplied what's inside the brackets
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50t + 60t - 60 = 380
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110t = 380 + 60; added 60 to both sides
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110t = 440
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t = 440/110
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t = 4 hrs for Ching to meet Phil
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Check: (50*4) + (60*3) = 380
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