the surface area of a cuboid is 1372 CM square if its dimensions are in the ratio 4 : 2 : 1, find its length
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harsh2932:
My answer is also 7 but due lack of paper i left it to √343/7which is = √49 = 7.
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S. A= 1372
let the length be 4x,
breadth=2x, and
height =x
surface area= 2(lh+bh+lb)
1372=2(4x square X 2xs square X 8x square)
1372=2 X 14x square
1372=28x square
1372/28=x square.
49=X square
7 =square
let the length be 4x,
breadth=2x, and
height =x
surface area= 2(lh+bh+lb)
1372=2(4x square X 2xs square X 8x square)
1372=2 X 14x square
1372=28x square
1372/28=x square.
49=X square
7 =square
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