If A is a square matrix of order 3 with |A| = 5, then the value of |3A| is:
If A is a square matrix of order 3 with |A| = 5, then the value of |3A| is:
- A. 135
- B. 45
- C. 15
- D. 27
Answer: A) 135
Explanation: For a square matrix of order n, |kA| = kⁿ|A|. Here n = 3, k = 3, so |3A| = 3³ × 5 = 27 × 5 = 135.
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