Evaluate \(\sqrt{20}\times (\sqrt{5})^3\)
MATHEMATICS
WAEC 1997
Evaluate \(\sqrt{20}\times (\sqrt{5})^3\)
- A. 10
- B. 20
- C. 25
- D. 50
Correct Answer: D. 50
Explanation
\(\sqrt{20}\times (\sqrt{5})^3\\
2\sqrt{5}\times \sqrt{5}\times \sqrt{5}\times \sqrt{5}=2\times 5\times 5 = 50\)
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