Subject
Quantitative Aptitude
Topic
Equation
If y/x = 3/7 and x + 2y = 13 then y is
If y/x = 3/7 and x + 2y = 13 then y is
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4গ)
5ঘ)
6Explanation
দেওয়া আছে, y/x = 3/7 ⇒ y = (3/7)x এখন এই মানটি দ্বিতীয় সমীকরণে বসাই: x + 2y = 13 ⇒ x + 2×(3/7)x = 13 ⇒ x + (6/7)x = 13 ⇒ (1 + 6/7)x = 13 ⇒ (13/7)x = 13 এখন দুই পাশে 13 দিয়ে ভাগ দিই: x = 13 ÷ (13/7) = 13 × (7/13) = 7 এখন x = 7 হলে, y = (3/7) × 7 = 3 সঠিক উত্তর: A) 3Related questions
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