Question
If 2x +3y = 30 and (x+y)/y = 11/8, then find the value of 5y + 6x
यदि 2x + 3y = 30 और (x + y) / y = 11/8, तो 5y + 6x का मान ज्ञात करें?
A.
B.
C.
D.
Answer B.
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B.2x + 3y = 30 --------- (i) (x+y)/y = 11/8 8x + 8y = 11y 8x – 3y =0 ----(ii) After adding (i) & (ii) 10 x = 30 x = 3. Put x = 3 in equation (i) 2*3+3y=30 3y=24 y=8 Put the value of x and y in equation- 5y + 6x = (5 * 8 + 6 * 3) = 40 + 18 = 58 So the correct answer is option B.
B.2x + 3y = 30 --------- (i) (x+y)/y = 11/8 8x + 8y = 11y 8x – 3y =0 ----(ii) समीकरण (1) और (2) को जोड़ने पर 10 x = 30 x = 3 x=3 समीकरण (1) में रखने पर 2*3+3y=30 3y=24 y=8 समीकरण में x और y का मान रखें 5y + 6x = (5 * 8 + 6 * 3) = 40 + 18 = 58 इसलिए सही उत्तर विकल्प B है।
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