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If a/b=4/5a n d b/c=(15)/(16)t h e n(c^2...

If `a/b=4/5a n d b/c=(15)/(16)t h e n(c^2-a^2)/(c^2+a^2)` would be `1/7` b. `3/4` c. `7/(25)` d. none of these

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RS AGGARWAL-RATIO AND PROPORTION-All Questions
  1. If 5a+3b :2a-3b=23 :5, then the value of a : b is a.\ 1:2\ b. 2:1 c. ...

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  2. If x : y=7:3, then the value of (x y+y^2)/(x^2-y^2) is 3/4 b. 4/3 c. 3...

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  3. If a/b=4/5a n d b/c=(15)/(16)t h e n(c^2-a^2)/(c^2+a^2) would be 1/7 b...

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  4. If a : b=b : c ,\ t h e n\ a^4: b^4 would be equal to a c : b^2 ...

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  5. If x : y=3:4\ a n d\ a : b=1:2, then the value of (2x a+y b)/(3y b-...

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  6. If a : b : c=2:3:4,\ t h e n1/a :1/b :1/c is equal to 1/4:1/3:1/2 b. 4...

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  7. If 1/x :1/y :1/z=2:3:5\ t h e n\ x : y : z is equal to 2:3:5 b. 15 : 1...

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  9. If a :(b+c)=1:3\ a n d\ c :(a+b)=5:7,\ t h e\ b :(a+c) is equal to 1:2...

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  10. If a : b=3:4,\ b : c4:7,\ t h e n(a+b+c)/c is equal to 1 b. 2 c....

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  11. If A : B : C=2:3:5 and A=x %\ of\ (B+C), then x is equal t...

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  12. x , y , z ,\ u are real nubs such that x : y=y : z=z : u\ a n d\ x ...

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  13. If a : b : c=2:3:4\ a n d\ 2a-3b+4c=33 , then the value of c is ...

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  15. If A : B : C=2:3:4, then the ratio A/B : B/C : C/A is equal t...

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  16. If a : b=5:7\ a n d\ c : d=2a :3b ,\ t h e n\ a c : b d is 10 : 21 b...

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