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On the basis of given measure determine surface area of cuboidal wooden log, cuboidal brick and box. |
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Answer» (i) Surface area of cubical wooden log = 6 a2 = 6 x (8)2 = 6 x 64 = 384 cm2 (ii) Surface area of brick = 2 (lb + bh + hl) = 2(9 x 5 + 5 x 3 + 3 x 9) = 2 (45 + 15 + 27) = 2 (87) = 174 cm2 (iii) Surface area of box = 2 (lb + bh + hl) = 2 (150 x 40 + 40 x 70 + 70 x 150) = 2 (6000 + 2800 + 10500) = 2 (19300) = 38600 cm2 |
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