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Math Help - Math 11

  1. #1
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    Math 11

    The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material?


    thanks if you helped.
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  2. #2
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    Re: Math 11

    Quote Originally Posted by Montelneedshelp View Post
    The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material?


    thanks if you helped.
    hint: triangle area = (1/2)bh
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  3. #3
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    Re: Math 11

    Quote Originally Posted by Montelneedshelp View Post
    The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material?


    thanks if you helped.
    Area of the roof = A=4\cdot \frac{18 \cdot 12}{2}

    Cost of the roof = C=5.75 \cdot A
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  4. #4
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    Re: Math 11

    Did you do some work, like googling "square pyramid" ?
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