यदि \(r=\sqrt{20}+\sqrt{45}\) है, तो (r) किसके बराबर है?
If \(r=\sqrt{20}+\sqrt{45}\), what is (r) equal to?
Explanation opens after your attempt
A. \(5\sqrt{5}\)
Concept
\(\sqrt{20}=2\sqrt{5}\) and \(\sqrt{45}=3\sqrt{5}\). Therefore \(r=5\sqrt{5}\).
Why this answer is correct
The correct answer is A. \(5\sqrt{5}\). \(\sqrt{20}=2\sqrt{5}\) and \(\sqrt{45}=3\sqrt{5}\). Therefore \(r=5\sqrt{5}\).
Exam Tip
\(\sqrt{20}=2\sqrt{5}\) और \(\sqrt{45}=3\sqrt{5}\) है। इसलिए \(r=5\sqrt{5}\) है।
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