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Write the name of Prince unit in which converts lens is used |
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Answer» The surface area of a cuboid is 1372 sq cm.The dimensions of the cuboid are in ratio 4:2:1\sf{\huge{\underline{\pink{To\:Find :-}}}} TOFIND:− The dimensions of a cuboid .\sf{\huge{\underline{\purple{Solution :-}}}} Solution:− We have,The dimensions of the cuboid are in ratio 4:2:1Take in form of l = 4x, b = 2x & h = x .TOTAL Surface Area of Cuboid= 2(lb + bh +lh)➝ 2 {(4x×2x)+(2x×x)+(x×4x) }➝ 2 {(8x² +2x² + 4x²)}➝ 2 × 14x²➝ 28x²We have, The surface area of a cuboid is 1372 sq cm.➝ 28x² = 1372➝ x² = \cancel{\dfrac{1372}{28}} 281372 ➝ x² = 49➝ x = √49➝ x = 7Length = 4x = 4 × 7 = 28Breadth = 2x = 2 × 7 = 14Hieght = x = 7________________________________ |
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