If three numbers are in the ratio 3 : 2 : 5 such that the sum of their squares is equal to 1862, the middle number is equal to :यदि तीन संख्याएँ 3 : 2 : 5 के अनुपात में इस प्रकार हैं कि इन संख्याओं के वर्गों का योग 1862 के बराबर है। मध्य वाली संख्या बराबर है :
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Correct answer: B. 14
Explanation
Let the numbers be 3x, 2x and 5x. Then 9x² + 4x² + 25x² = 38x² = 1862, so x² = 49 and x = 7. The middle term of the ratio is 2x = 14.माना संख्याएँ 3x, 2x तथा 5x हैं। तब 9x² + 4x² + 25x² = 38x² = 1862, अतः x² = 49 और x = 7। अनुपात का मध्य पद 2x = 14 है।More Mathematics & Numerical Ability questions
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