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The length, breadth and height of a cuboid are 8cm, 7\(\frac{1}{2}\)cm and 6\(\frac{1}{2}\) cm respectively....

Mathematics
NECO 2002

The length, breadth and height of a cuboid are 8cm, 7\(\frac{1}{2}\)cm and 6\(\frac{1}{2}\) cm respectively. What Is its volume in m3 (leave your answer in standard form)?

  • A. 3.9 × 10-1m3
  • B. 3.9 × 10-2m3
  • C. 3.9 × 10-3m3
  • D. 3.9 × 10-4m3
  • E. 3.9 × 10-5m3
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Correct Answer: Option D
Explanation

Given: L = 8cm, B = 7\(\frac{1}{2}\)cm = 7.5cm, H = 6\(\frac{1}{2}\)cm = 6.5cm

Volume of cuboid = LBH = 8 x 7.5 x 6.5 = 390cm\(^3\) but in m\(^3\) = \(\frac{390}{1000000}\) = 0.00039m\(^3\)

0.00039m\(^3\) = 3.9 x 10\(^{-4}\)m\(^3\)


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