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If (4x^2-3y^2):(2x^2+5y^2)=12:19 then x:...

If `(4x^2-3y^2):(2x^2+5y^2)=12:19` then `x:y=`

A

`1:2`

B

`4:3`

C

`4:5`

D

`3:2`

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The correct Answer is:
D
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ADVANCED MATHS BY ABHINAY MATHS ENGLISH-RATIO & PROPORTION-QUESTIONS
  1. If (a +b) : (b +c) : (c +a) ::6:7:8 & a+b+c= 14 then find c=?

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  2. If a :b::3:4 & b:c:: 4:7. then (a +b + c)/( c ) = ?

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  3. If (4x^2-3y^2):(2x^2+5y^2)=12:19 then x:y=

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  4. If Q = (p + q + r )/(2) & (Q-p ) : (Q-q) : (Q -r)::17:5:8. then p :q:r...

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  5. In a triangle ABC, (s-a): (s-b) : (s -c) ::11 : 8: 7 where s is semi p...

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  6. If (x -y +z) : (y - z + 2w) : (2x + z-w) =2: 3:5, then (3x + 3z - 2w):...

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  7. What is the mean proportional of 3 + sqrt2 , 12 - sqrt32

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  8. What is the mean proportional of (15+ sqrt200) and (27- sqrt 648)?

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  9. The third proportional to (x/y + y/x) andsqrt(x^2 + y^2) is

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  10. What is the fourth proportional of 18,24,30.

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  11. What is the fourth proportional of x ^(2) -y ^(2) , x + y , x -y.

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  12. The mean proportional between 45 and a certain number is three times t...

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  13. If the mean proportional between X and Y is n times the third proporti...

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  14. If (x)/(y) = 3/4 , then (2x + 3y)/( 3x - 2y) = ?

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  15. If a/b= 3/2, then (a ^(2) +b ^(2) )/(a ^(2) - b ^(2)) = ?

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  16. If a/b=c/d=e/f=9/5 then (2a + 3c + 5e)/( 2b + 3d + 5f) = ?

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  17. If a/b = c/d =e/f = 4, then ( ma + nc + pe )/( mb + nd + pf) = ?

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  18. If a/b = c/d =e/f = 4, then (ma ^(2) + nc ^(2) + pe ^(2))/( mb ^(2)...

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  19. If a/b = c/d =e/f = 4, then (m ^(2) a + n^(2) c + p ^(2) e )/( m ^(2...

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  20. If a /b = c/d = 3/2, then (13 a - 111c)/(13 b - 111d ) = ?

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