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dhudz23

  • one year ago

Two cyclist A and B traveled the same distance of 120 kilometers. A traveled 4 kilometers per hour faster than B and covered the distance in one hour less than B. Find the rate of each.

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  1. Azteck
    • one year ago
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    (x+4)\[\frac{ 120 }{ x+4 }=\frac{ 120 }{ x }+1\] x is the rate at which B is travelling (ie. xkm/h)

  2. sauravshakya
    • one year ago
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    There SOLVE FOR x

  3. Azteck
    • one year ago
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    Wait it's incorrect for some reason. I made a mistake.

  4. Azteck
    • one year ago
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    Tried solving it, but nothing came out.

  5. sauravshakya
    • one year ago
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    120/(x+4) =120/x +1 120/(x+4) =(120+x)/x 120x =(120+x)(x+4) 120x =120x +480 +x^2 +4x x^2 +4x +480 =0

  6. Azteck
    • one year ago
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    That's the problem.

  7. sauravshakya
    • one year ago
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    which has NO real SOLUTION

  8. sauravshakya
    • one year ago
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    It is should be 120/(x+4) =120/x -1

  9. sauravshakya
    • one year ago
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    Beacuse A takes 1 hour less than B

  10. sauravshakya
    • one year ago
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    |dw:1358852927217:dw|

  11. sauravshakya
    • one year ago
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    U need to solve it

  12. Azteck
    • one year ago
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    Yeah. A bit of confusion but we got there.

  13. higiraffe
    • one year ago
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    x is a imaginary number.

  14. Azteck
    • one year ago
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    No. Read suarav's post.

  15. Azteck
    • one year ago
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    it's not +1 it's -1

  16. higiraffe
    • one year ago
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    -2 + 21.82i or -2-21.82i

  17. Azteck
    • one year ago
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    \[\frac{ 120 }{ x+4 }=\frac{ 120 }{ x }-1\]

  18. Azteck
    • one year ago
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    I previously wrote +1

  19. Azteck
    • one year ago
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    instead of -1

  20. higiraffe
    • one year ago
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    oh really sorry, I have a mistake. x=24.

  21. Azteck
    • one year ago
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    That's incorrect still. Try again.

  22. higiraffe
    • one year ago
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    really?? . so, x=20, right??? Don't tell me it's still incorect ..:(

  23. Azteck
    • one year ago
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    Correct. Well done.

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