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anonymous

  • 5 years ago

marie and Lucy left from the same place and the same tim drove in opposite directions along a straighrt road. Marie drove 15 miles faster than Lucy. After 3 hours, they were 315 miles apart. Find the rate at which each travled.

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  1. sgadi
    • 5 years ago
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    speed of marie = 60mph speed of lucy = 45mph

  2. anonymous
    • 5 years ago
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    thanks can you show me the steps.

  3. sgadi
    • 5 years ago
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    distance = 315 time = 3 hours so, speed (s)= 315/3=105 but given that speed of marie (m) is 15mph greater than the speed of lucy (l) \[m=l+15\] Total speed \[s=l+m=2l+15=105 \Rightarrow l=45\] so, \[m=l+15=60\]

  4. anonymous
    • 5 years ago
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    Thank you so much for your help

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