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Artchicky

  • 2 years ago

It takes Maria 11 mins to weed a garden. Mike can weed the same garden in 10 minutes. How long would it take them if they work together? - I got 21 mins but i honestly don't know how to round it.

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  1. saifoo.khan
    • 2 years ago
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    \[\frac 1x =\frac{1}{10}+\frac{1}{11}\]

  2. saifoo.khan
    • 2 years ago
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    1/10 = Mike's part. 1/11 = Maria'a part. 1/x = time it will take if both will work.

  3. Artchicky
    • 2 years ago
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    Alright and so then i would find the common denominator and then solve for the x?

  4. hba
    • 2 years ago
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    Now take the lcm,cross multiply and get to x.

  5. saifoo.khan
    • 2 years ago
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    Yes.

  6. Artchicky
    • 2 years ago
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    I got 120/110. do i divide 110 by 120 and turn it into a decimal?

  7. saifoo.khan
    • 2 years ago
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    Nope/

  8. Artchicky
    • 2 years ago
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    -.- okay so for my lcd i did 11 by 10. then okay i messed up my adding. it should be 21/110

  9. saifoo.khan
    • 2 years ago
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    1/x = 21/110

  10. Artchicky
    • 2 years ago
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    then i would multiply the 1 and that would isolate the x. leaving me with the 21/110 and then i simplify it?

  11. saifoo.khan
    • 2 years ago
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    x is in the denominator currently. Do something to bring it to the numerator.

  12. Artchicky
    • 2 years ago
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    multiply the 110 to the top and bottom. I would get 110 over 110x?

  13. hba
    • 2 years ago
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    See this, \[\frac{ 1 }{ a }=\frac{ 11 }{ 10 }\] \[a=\frac{ 10 }{ 11 }\]

  14. saifoo.khan
    • 2 years ago
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    |dw:1358612774385:dw|

  15. Artchicky
    • 2 years ago
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    okay now i understand

  16. hba
    • 2 years ago
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    \[\frac{ 1 }{ x }= \frac{21}{110}\] \[\ x=..\]

  17. Artchicky
    • 2 years ago
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    5.23?

  18. saifoo.khan
    • 2 years ago
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    Yes.

  19. saifoo.khan
    • 2 years ago
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    Lol. I'm speechless.

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spraguer (Moderator)
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