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The length, breadth and height of a cuboid are 20cm , 15cm and 10cmrespectively. Find its total surface area.

Solution

L = 20cm , B = 15cm , H = 10cm
Surface area of cuboid = 2(lb + bh + hl)
= 2(20×15+15×10+10×20)cm²
= 2(300 + 150 + 200)cm²
= 2(650)cm² = 1300cm²

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