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If a ; b=c : d=e :f=1:2,\ t h e n\ (3...

If `a ; b=c : d=e :f=1:2,\ t h e n\ (3a+5c+7e):(3b=5d+7f)` `1:2` b. `1:4` c. `2:1` d. `8:7`

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RS AGGARWAL-RATIO AND PROPORTION-All Questions
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  2. If a : b=2:3\ a n d\ b : c=4:5,\ t h e n(a+b):(b+c) is equal to ...

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  3. If a ; b=c : d=e :f=1:2,\ t h e n\ (3a+5c+7e):(3b=5d+7f) 1:2 b. 1:...

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  4. Given a:b=5:3 and b:c = 2:5 Which of the following is true?

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  6. (c-a) will be equal to 10(a+c) II. 10 a+2b a. only I is true b....

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  9. Fourth proportional to(a^2-b^2\ ),\ (a^2-a b),\ (a^3+b^3) is (a-b) ...

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  10. The third proportional to 38 and 15 is (15xx15)/(38) b. (38xx15)/2 ...

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  11. The third proportional to (x^2-y^2)a n d\ (x-y) is (x+y) b. (x-y) c...

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  12. The mean proportional between 234 and 104 is a. 12 ...

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  13. The mean proportional between 0.02 and 0.32 is a. 0.3     b. 0.08 ...

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  14. The mean proportional between (3+sqrt(2))a n d\ (12-sqrt(32)) is sq...

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