Question:
The mean proportional between 2.8 and 0.7 is:
2.8 और 0.7 के बीच का मध्यानुपाती (mean proportional) क्या है?
Options:
- (A) 1.4
- (B) 1.8
- (C) 1.9
- (D) 1.2
- (A) 1.4
- (B) 1.8
- (C) 1.9
- (D) 1.2
Correct Answer: Option A
Explanation:
Detailed Explanation: Mean proportional \(x = \sqrt{2.8 \times 0.7} = \sqrt{1.96} = \mathbf{1.4}\).
विस्तृत व्याख्या: मध्यानुपाती \(x = \sqrt{a \times b} = \sqrt{2.8 \times 0.7} = \sqrt{1.96} = \mathbf{1.4}\)।