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anonymous

  • one year ago

HELPP!! Two airplanes leave an airport at the same time. the first airplane flies east at 635mph. the second airplane flies west at 615mph. how long will it take for the airplanes to be 1,000 miles apart?

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  1. anonymous
    • one year ago
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    Answer = 0.8 hours = 48 minutes Relative Speed of Fast plane = 635 mph + 615 mph = 1250 mph Time to 1000 miles = 1000 miles / 1250 miles per hour = 0.8 hours Speed in opposite direction = v1 + v2 Speed in Same direction = v1-v2 v1 = speed of fast object v2 = speed of slower object

  2. anonymous
    • one year ago
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    so 48 minutes?

  3. anonymous
    • one year ago
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    yup :)

  4. anonymous
    • one year ago
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    8 hrs?

  5. anonymous
    • one year ago
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    its bout flieing so how can it be 48 minutes? :/

  6. anonymous
    • one year ago
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    its impossible

  7. anonymous
    • one year ago
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    start with the basics : speed = distance/time

  8. anonymous
    • one year ago
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    i did

  9. Jhannybean
    • one year ago
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    Draw yourself a diagram.

  10. anonymous
    • one year ago
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    would agree with @Jhannybean

  11. anonymous
    • one year ago
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    kk

  12. anonymous
    • one year ago
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    thats what i got :b

  13. Jhannybean
    • one year ago
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    @Rachel_K Would you please stop giving answers? It's against the code of conduct here on OS.

  14. anonymous
    • one year ago
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    i didn't i explained in the beginning im just confirming what i got

  15. anonymous
    • one year ago
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    .

  16. anonymous
    • one year ago
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    |dw:1437583414784:dw|

  17. mathstudent55
    • one year ago
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    @Rachel_K You answered correctly above 0.8 hours = 48 minutes. Later you wrote 8 hours and 48 minutes.

  18. anonymous
    • one year ago
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    ok then so i was right

  19. mathstudent55
    • one year ago
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    Yes, you were, and your explanation above about adding speeds was good. If one plane alone traveling at 635 mph would cover 1000 miles in little more than an hour, then it makes sense that two planes traveling in opposite directions both at 600 something mph would be 1000 miles part from each other in under an hour.

  20. anonymous
    • one year ago
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    As @Rachael said total speed = 635mph+ 615mph = 1250mph however, to fly 1,000 miles = 1000m/1250mph = 0.8 hours

  21. anonymous
    • one year ago
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    I think we should give it to @Rachel_K here. I am giving it as best response.

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