Evaluate
200\sqrt{5}\approx 447.2135955
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100\sqrt{20\times 1}
Multiply 2 and 50 to get 100.
100\sqrt{20}
Multiply 20 and 1 to get 20.
100\times 2\sqrt{5}
Factor 20=2^{2}\times 5. Rewrite the square root of the product \sqrt{2^{2}\times 5} as the product of square roots \sqrt{2^{2}}\sqrt{5}. Take the square root of 2^{2}.
200\sqrt{5}
Multiply 100 and 2 to get 200.
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