यदि \(r=\sqrt{20}+\sqrt{45}\) है, तो (r) किसके बराबर है?

If \(r=\sqrt{20}+\sqrt{45}\), what is (r) equal to?

Author: Muft Shiksha Editorial Team Published:
Explanation opens after your attempt
Correct Answer

A. \(5\sqrt{5}\)

Step 1

Concept

\(\sqrt{20}=2\sqrt{5}\) and \(\sqrt{45}=3\sqrt{5}\). Therefore \(r=5\sqrt{5}\).

Step 2

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 \(r=5\sqrt{5}\).

Step 3

Exam Tip

\(\sqrt{20}=2\sqrt{5}\) और \(\sqrt{45}=3\sqrt{5}\) है। इसलिए \(r=5\sqrt{5}\) है।

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Mathematics Answer, Explanation and Revision Hints

यदि \(r=\sqrt{20}+\sqrt{45}\) है, तो (r) किसके बराबर है? / If \(r=\sqrt{20}+\sqrt{45}\), what is (r) equal to?

Correct Answer: A. \(5\sqrt{5}\). Explanation: \(\sqrt{20}=2\sqrt{5}\) और \(\sqrt{45}=3\sqrt{5}\) है। इसलिए \(r=5\sqrt{5}\) है। / \(\sqrt{20}=2\sqrt{5}\) and \(\sqrt{45}=3\sqrt{5}\). Therefore \(r=5\sqrt{5}\).

Which concept should I revise for this Mathematics MCQ?

\(\sqrt{20}=2\sqrt{5}\) and \(\sqrt{45}=3\sqrt{5}\). Therefore \(r=5\sqrt{5}\).

What exam hint can help solve this Mathematics question?

\(\sqrt{20}=2\sqrt{5}\) और \(\sqrt{45}=3\sqrt{5}\) है। इसलिए \(r=5\sqrt{5}\) है।