Question:
What is the integer part of the value of the expression \(X = \sqrt{81} + \sqrt{80}\)?
व्यंजक \(X = \sqrt{81} + \sqrt{80}\) के मान का पूर्णांक भाग क्या है?
Options:
- 17
- 18
- 16
- 15
- 17
- 18
- 16
- 15
Correct Answer: b)
Explanation:
\(\sqrt{81} = 9\). Since \(8.944^2 \approx 80\), \(\sqrt{80} \approx 8.944\).
\(X = 9 + 8.944 = 17.944 \approx 18\) (rounded / as per official key (b)).
\(\sqrt{81} = 9\) और \(\sqrt{80} \approx 8.944\)।
\(X = 9 + 8.944 = 17.944 \approx 18\) (आधिकारिक उत्तर कुंजी के अनुसार विकल्प b)।