1. We have moved from vBulletin to XenForo and you are viewing the site in the middle of the move. Though the functional aspect of everything is working fine, we are still working on other changes including the new design on Xenforo.
    Dismiss Notice

Mow a lawn Puzzle | 28 Jun 2009

Discussion in '$1 Daily Competition' started by shabbir, Jun 28, 2009.

  1. shabbir

    shabbir Administrator Staff Member

    Joined:
    Jul 12, 2004
    Messages:
    15,276
    Likes Received:
    364
    Trophy Points:
    83
    "A" can mow a lawn in 2 hours while "B" can do so in 2.5 hours separately. If A & B work together, how long will it take for them to mow the lawn?
     
  2. mayjune

    mayjune New Member

    Joined:
    Jun 14, 2009
    Messages:
    817
    Likes Received:
    33
    Trophy Points:
    0
    Occupation:
    Student
    Location:
    Pune,Delhi
    Ans is 1.112 hours (aprox)

    Lets say the lawn is 1000 sq mts
    A takes 1000/120 mins i.e. in one min = 8.334 mts
    B takes 1000/150 mins i.e. in one min = 6.667 mts
    Total time = x
    6.66x + 8.33x = 1000
    x = 66.67 (aprox)
    Therefore 1.112 hours (aprox)
     
  3. shabbir

    shabbir Administrator Staff Member

    Joined:
    Jul 12, 2004
    Messages:
    15,276
    Likes Received:
    364
    Trophy Points:
    83
    In 1 hour, A can mow 1/2 the lawn.
    In 1 hour, B can mow 2/5 of the lawn.
    Together in 1 hour, they can mow 1/2 + 2/5 = 9/10 of the lawn.
    So to complete the lawn mowing, it will take them 10/9 hours.

    Its rare we have a Winner before a post from Saswat :D
     
  4. SaswatPadhi

    SaswatPadhi ~ Б0ЯИ Τ0 С0δЭ ~

    Joined:
    May 5, 2009
    Messages:
    1,343
    Likes Received:
    55
    Trophy Points:
    0
    Occupation:
    STUDENT !
    Location:
    Orissa, INDIA
    Home Page:
    Actually, I have already reached the limit : 3 wins/week. So I was not actually waiting for Today's puzzle. ;)

    Congrats mayjune.
     
  5. mayjune

    mayjune New Member

    Joined:
    Jun 14, 2009
    Messages:
    817
    Likes Received:
    33
    Trophy Points:
    0
    Occupation:
    Student
    Location:
    Pune,Delhi
    donate my 1$ to the open source please...
     
  6. shabbir

    shabbir Administrator Staff Member

    Joined:
    Jul 12, 2004
    Messages:
    15,276
    Likes Received:
    364
    Trophy Points:
    83
    Will do that. And as always if you have any open source projects please do let me know.
     
  7. mayjune

    mayjune New Member

    Joined:
    Jun 14, 2009
    Messages:
    817
    Likes Received:
    33
    Trophy Points:
    0
    Occupation:
    Student
    Location:
    Pune,Delhi
    will do...
     

Share This Page