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प्रश्न
Three cubes, each with 8 cm edge, are joined end to end. Find the total surface area of the resulting cuboid.
योग
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उत्तर
Each cube has an edge of 8 cm.
Joined end-to-end, the cuboid has dimensions 24 cm × 8 cm × 8 cm.
Total surface area = 2(lw + lh + wh)
= 2(24 × 8 + 24 × 8 + 8 × 8)
= 2(192 + 192 + 64)
= 2(448)
= 896 cm2
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