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anonymous

  • one year ago

If a sprinkler waters 1 over 15 of a lawn in 1 over 5 of an hour, how much time will it take to water the entire lawn? 2 hours 3 hours 10 hours 15 hours

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  1. Hero
    • one year ago
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    @_greatmath7 giving answers is against CoC

  2. anonymous
    • one year ago
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    I never saw the answer, yay :)

  3. anonymous
    • one year ago
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    @Hero can you walk me through it?

  4. Hero
    • one year ago
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    Well, do you know how to figure out how much 1/5 of an hour is in minutes?

  5. anonymous
    • one year ago
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    not really

  6. Hero
    • one year ago
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    Well let's do it this way: 1/5 of an hour = 1/5 times 60 minutes = 60/5 minutes.

  7. anonymous
    • one year ago
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    ok

  8. anonymous
    • one year ago
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    60/5 would be 13 right?

  9. anonymous
    • one year ago
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    no no 12?

  10. Hero
    • one year ago
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    Yes, correct, now think of it this way: Every 12 minutes, 1/15 of the lawn is watered so... The first 12 minutes, 1/15 is watered After 24 minutes, 2/15 is watered ... After 36 minutes 3/15 is watered ... So as you can see, once we get to 15/15, the whole lawn will be watered which will be a total of 15 intervals until the whole lawn is watered. The shortcut to calculate this is to simply take 12 and multiply it by 15. So 12×15 minutes. Then divide that amount by 60 to convert back to hours.

  11. Hero
    • one year ago
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    Sorry, had to correct a typo.

  12. anonymous
    • one year ago
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    ok

  13. anonymous
    • one year ago
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    so then it would be 15 right?

  14. Hero
    • one year ago
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    What kinds of calculations have you made so far? If you did what I explained, there's no way you get 15. Show me what you did to get 15.

  15. anonymous
    • one year ago
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    well i didnt get 15 i got 30. i thought that would be 3 hours but 15 made more sense. this is what is did..

  16. Hero
    • one year ago
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    Make sure you read the instructions I wrote exactly first.

  17. Hero
    • one year ago
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    15 is just the number of intervals it takes to water the entire lawn.

  18. anonymous
    • one year ago
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    12 x 15 = 180 180/60 = 3

  19. Hero
    • one year ago
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    Yes, that's better.

  20. anonymous
    • one year ago
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    oh i said 30 before >_<

  21. anonymous
    • one year ago
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    i meant 3. Would that be 3 hours then?

  22. Hero
    • one year ago
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    Yes, it would.

  23. anonymous
    • one year ago
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    ok thank you i will do what i did for this on other questions. i have so many like this

  24. Hero
    • one year ago
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    Good luck with it.

  25. anonymous
    • one year ago
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    Thank you for the help. :)

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