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  1. #1
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    Default breakfast rebate

    if l may ,,it all started when l did my anything l should know with the kids this mornings (as they know l will tickle to get the information )find out the boy 11yo is in the mathematical olympiads so there a bit fuss made blu blu .This is a big contest schools put in teams and they are tring to get a good score ,its like a footy team thing ,kid want to make the team and our shows that don"t give up on the public system our school ranks up there with the bigger schools

    debate starts now
    question 1-D
    A rectangle has a perimeter of 90cm .the length of the rectangle is 25 cm
    more than the width

    find the of sq cm in the area of the rectangle

    you have 6 Minutes
    smile and the world will smile with you

  2. #2
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    20cm?
    I may not have gone where I intended to go, but I think I have ended up where I needed to be.

    My Other Toys

  3. #3
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    is that your answer 20cm sq
    smile and the world will smile with you

  4. #4
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    10cm x 35cm gives an area of 350cm2

    I will put it to my year 6/7 maths class this morning and see how long it takes.

  5. #5
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    20cm wide....

    500sq cm (Not good at this calc)
    I may not have gone where I intended to go, but I think I have ended up where I needed to be.

    My Other Toys

  6. #6
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    Quote Originally Posted by Burnsy View Post
    10cm x 35cm gives an area of 350cm2

    I will put it to my year 6/7 maths class this morning and see how long it takes.
    no im with Gra 500 sq
    25 top 20 sides =500 sq
    90=2x25+ (x+x)x=20
    smile and the world will smile with you

  7. #7
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    What is happening here boys.
    Visit my website at www.myFineWoodWork.com

  8. #8
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    The number of prime numbers is infinite. Prove it

    Don't take me seriously.
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  9. #9
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    Quote Originally Posted by Wongo View Post
    What is happening here boys.
    come on wongo you are smart man you tell them that l am right
    smile and the world will smile with you

  10. #10
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    10cm X 35cm = 350 cm^2
    Visit my website at www.myFineWoodWork.com

  11. #11
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    I am with burnsy - area is 350 sq cm

    Calculation is Length = width + 25
    2W + 2 W + 50 = 90 (perimeter)
    4W = 40
    W = 10
    L = 10 + 25 = 35
    Area is L x W = 10 x 35 = 350

    Here endeth the maths lesson
    Tom

    "It's good enough" is low aim

  12. #12
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    Don’t bother guys. These things are always won by the Chinese.
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  13. #13
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    Where did 10 x 35 come from....????

    The question was perimiter = 90cm
    and the length was 25cm....


    from this two lenths of 25cm's = 50 cm
    Perimiter - two lengths = twice width
    90 - 50cm = 40cm
    so width = 40cm/2

    So rectangle = 20cm X 25cm...

    Length x Width = Area
    20cm X 25cm = 500Sq cm
    I may not have gone where I intended to go, but I think I have ended up where I needed to be.

    My Other Toys

  14. #14
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    Quote Originally Posted by SPIRIT View Post
    no im with Gra 500 sq
    25 top 20 sides =500 sq
    90=2x25+ (x+x)x=20
    Quote Originally Posted by Gra View Post
    Where did 10 x 35 come from....????

    The question was perimiter = 90cm
    and the length was 25cm....


    from this two lenths of 25cm's = 50 cm
    Perimiter - two lengths = twice width
    90 - 50cm = 40cm
    so width = 40cm/2

    So rectangle = 20cm X 25cm...

    Length x Width = Area
    20cm X 25cm = 500Sq cm
    You have both done what most 11 and 12 year olds do - not read the question

    Length is 25cm MORE than the width

  15. #15
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    no 90-50 =40 and you make rectangle once you cut it in half to back e/lenths l have made rectangle yes we know the question says the length is 25 so that 50 ok your left with 40 half that 20 20 x 25 =500
    smile and the world will smile with you

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