यदि \( \sqrt{72} \) सर्पिल में बना है, तो इसे \(a\sqrt{2}\) के रूप में लिखने पर (a) क्या होगा?
If \( \sqrt{72} \) is formed in the spiral, what is (a) when it is written as \(a\sqrt{2}\)?
Explanation opens after your attempt
D. (6)
Concept
\( \sqrt{72}=\sqrt{36\times 2}=6\sqrt{2} \), so (a=6). Look for a perfect-square factor.
Why this answer is correct
The correct answer is D. (6). \( \sqrt{72}=\sqrt{36\times 2}=6\sqrt{2} \), so (a=6). Look for a perfect-square factor.
Exam Tip
\( \sqrt{72}=\sqrt{36\times 2}=6\sqrt{2} \), इसलिए (a=6)। गुणनखंड में पूर्ण वर्ग ढूँढें।
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