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The surface area of cuboid is …

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The surface area of cuboid is 1372 sq cm. If it's dimmensions are the ratio 4:2:1then it's length will be

    • Posted by Prachi Singh 3 years, 8 months ago

    CBSE > Class 09 > Mathematics
    • 2 answers

    Palak Gupta 3 years, 8 months ago

    Let the length be 4x Let the breadth be 2x Let the height be x Surface area=2(lb+bh+hl) =2(8x²+2x²+4x²) =28x²=1372 so x²=49 and x=7 So length=4x=28cm breadth=2x=14cm &. height=x=7cm I hope the above solution will help you...

    1Thank You

    Khushi Kaur 3 years, 8 months ago

    Given the surface area of cuboid as 1372cm2 , length are in the ratio of 4:2:1 Let the lenght, breadth and height of cuboid are 4x ,2x and x respectively. surface area of cuboid = 2(lb+bh+lh) where l= length of cube , b = breadth , h = height of cube surface area of cuboid = 2(lb+bh+lh) 1372= 2(4x*2x+2x*x+4x*x) 1372= 2(8x2+2x2+4x2) 1372= 2*14x2 1372= 28X2 1372/28 = X2 X2 = 49          // TAKING SQUARE ROOT // √X2 =√49 X = 7 ​length of cuboid is 4x 7 =28cm

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